Three little frogs.

These are some photos of three treefrogs chilling. There are for a scene in our upcoming children's book, and we are looking for the best option. Our eight year old daughter Red-Pepper took the photos, and we'd like your help. If you had to choose only one of the photos below, which one would you pick as your favorite? Please reply with the corresponding letter to let us know. Thanks for the help, and enjoy the frog photos!