In Order to Predict Whether the Presence of Others Will

In order to predict whether the presence of others will help or hinder performance,one needs two pieces of information,whether _______ and whether _______.

A) individual performance can be evaluated; arousal is high or low.
B) group performance can be evaluated; the group has a strong leader.
C) arousal is present; one holds individualistic or collectivist values.
D) individual performance can be evaluated; the task is simple or complex.
E) arousal is high or low; the others are friends or strangers.