When Jeffrey Jackson and Kip Williams (1985)had Participants Solve Either

When Jeffrey Jackson and Kip Williams (1985) had participants solve either simple or difficult mazes,those who believed that their scores would be averaged with another person's performed better on difficult mazes than on simple mazes.These finding suggest that social loafing

A) arises when we believe that we cannot be evaluated.
B) impairs performance on simple tasks,but enhances performance on complex tasks.
C) impairs performance on complex tasks,but enhances performance on simple tasks.
D) is less likely when people focus more on the collective.
E) impairs performance on both simple and complex tasks,but more for simple tasks.