How does tecumseh use parallel structure and repetition to persuade his audience to join him

In this unit ,we learned about arguments and rhetoric.in an argument we ,not informal language.

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 the authors are most likely to attempt to answer which question