Which of the following is an example of social facilitation?
A. George chooses not to engage in certain tasks because he knows other members of the group will eventually do the work. B. Only choices A and C are examples of social facilitation. C. Kiera, a gymnast, gets so nervous when her friends come to her meets that she falls off the balance beam. D. Monita, who is a soccer player, performs better when there is a large group of people watching.