As an Individual You Generally Feel That $10 Per Person

Multiple Choice

As an individual you generally feel that $10 per person is an appropriate amount to spend on a going away gift for your long time supervisor,but you are in the minority.Although the average of the group's opinion is that 15 dollars is appropriate,the group decides that $20 is best.What is this deviation from the group mean towards a more extreme position is an example of?

A) Social inhibition
B) Group polarization
C) Brainstorming
D) Groupthink