This type of mentality is pretty dualistic and very retrograde. This test is pretty stupid, rather than simple. Let me try to educate anyone else before they fall for this polarized perspective. First lets start by searching the definition of Racism.

1. A belief or doctrine that inherent differences among the various human racial groups determine cultural or individual achievement, usually involving the idea that one's own race is superior and has the right to dominate others or that a particular racial group is inferior to the others.
2. A policy, system of government, etc., based upon or fostering such a doctrine; discrimination.
3. Hatred or intolerance of another race or other races.

So basically the most relevant keywords here are : 1. Belief in Superiority, Right to Dominate, Belief in Inferiority, Discrimination, Hatred, Intolerance. I think your test would be better based on the word "Discrimination" and not "Racist," so I don't think you're wrong but then lets define Discrimination:

1. To make a distinction in favor of or against a person or thing on the basis of the group, class, or category to which the person or thing belongs rather than according to actual merit; show partiality

I know this will only make what should have been a simple reply longer, but here is the definition for distinction while we're at it

1. A marking off or distinguishing as different:
2. The recognizing or noting of differences; discrimination:
3. A discrimination made between things as different; special regard or favoritism:

So your test probably fits more into a category of "discrimination and favoritism"
I don't see how you get "Preference alone is in fact racism," preference is preference and does not imply discrimination much less a belief in superiority. Favoritism and Discrimination do not imply anything but favoritism and discrimination as they are defined. Preferring to drink wine than to drink beer does not make you racist, and there is more than likely a reason why men prefer some woman over others. More than likely that reason is due to conditioning, and the environment in which one grows, but this is still preference, not racism. When you're young you tend to reject different flavors or tastes, me for example I hated any type of seafood until I grew up and acquired taste. The same thing can happen with any human having preference for one race, then acquiring taste for another race, but generally the reasons have nothing to do with racism or the belief in superiority/inferiority, hate and intolerance. It's just a simple preference, you're only trying to polarize an idea, which is against being truthful. The truth is neutral it is never black or white, positive or negative, the truth simply is. You can say the truth lies in between black and white, but whenever you are polarizing it you are doing so for your own agenda. By trying to impose that preference/favoritism/discrimination/ is racist, you will only perpetuate confusion and the big misconception the very people who centralize power and control are trying to achieve.

For those seeking the truth remember that the truth is unbiased and cannot be polarized, when you are ready to see things as they are rather than what you want them to be, when you are concerned with the understanding of mankind you will learn that neutrality is the quickest path to spiritual growth and the maturing of the human species. Only by learning to see the truth and removing our prejudices, our bias, assumptions, can we learn that we are all human, we are MEN of different HUE but we belong to a single species. If we are divided we have been fooled, and we will continue to be controlled. If we are united we can end war, poverty, famine, violence, homelessness and an infinite amount of problems.