Compared to Earlier Findings on Social Facilitation, What Do Recent

Compared to earlier findings on social facilitation, what do recent findings show about what happens to people's performance in the presence of others?

A) Performance improves in people with high achievement motivation.
B) Performance improves on easy tasks but suffers on difficult tasks.
C) Performance decreases on both easy and difficult tasks when being observed by someone of the opposite sex.
D) Performance on interesting tasks increases, but performance on boring tasks decreases.