I need Answers I can’t get it right

Does anyone read this story in 9th grade "when mr. pirzada came to dine"

Abelief that one's culture is superior to another.

How can you avoid the problem of groupthink? a. by choosing a group leader to direct the group b. by composing the team of only like-minded individuals c. by encouraging all members to voice their opinions d. by keeping quiet when you disagree with another group member's opinion