What Effect Does Being in a Group Have on Setting

What effect does being in a group have on setting goals?

A) Groups tend to set less ambitious goals than individuals.
B) Groups tend to set more ambitious goals than individuals.
C) Groups are more likely than individuals to set goals for disjunctive tasks,but not conjunctive tasks.
D) Groups are more likely than individuals to set goals for conjunctive tasks,but not disjunctive tasks.