Dr. Francis randomly assigned puppies to one of two conditions. One group of puppies grew up with the ability to choose when they would receive dog biscuits. The other group of puppies had no control over when they would receive the dog biscuits. In this scenario, the group of puppies who had no control over when they would receive the biscuits:
a. were more likely to be aggressive.
b. were less prone to neuroticism.
c. were more likely to show high levels of behavioral inhibition.
d. were more likely to display high levels of anxiety.