Why did the three chimps rush for the white coins and never touch the yellow ones?

Why does the author bring up the example of Benji A: To show that animals have consciousness. B: To raise the question of animal consciousness. C: Because Benji was his best friend. D: To illustrate the differences between dogs and chimps.

Dr. Leakey studied chimpanzees in Africa because ______. A: he thought that they were the best friends of humans' B: he believed that prehistoric people might live a life similar to the life chimps lived now C: he loved the animals D: the chimpanzees were very shy