Osborn Advocated Brainstorming,not Just Because a Group of People Ideating

Multiple Choice

Osborn advocated brainstorming,not just because a group of people ideating could come up with a large quantity of ideas,but also because:

A) ideas generated by one person in a team could stimulate ideas in other people in a synergistic fashion.
B) group brainstorming is more efficient than solitary brainstorming.
C) people work harder in a group than they would alone.
D) people's desire to be liked would motivate them to develop highly similar ideas.