Which of the Following Explanations for Social Facilitation Applies to Humans

Which of the following explanations for social facilitation applies to humans but NOT to cockroaches?

A) Humans are aroused at the prospect of evaluation.
B) Humans are more likely to perform well on a simple task when aroused.
C) Humans are more likely to perform their dominant response when aroused.
D) Humans are distracted by a number of stimuli, including members of their own species.
E) Humans are alert and aroused in the presence of other members of their species.