I need help please an exam

"ten from the sea to the sand he walks,to look in the soil, but not in the box''!

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

Based on this excerpt, charlotte smith and reverend walsh