What is a clincher in writing

A clincher sentence can be defined as a statement, argument, fact, situation, or the like, that is decisive or conclusive. In academic writing, this is a statement in a expository paragraph which reiterates the topic and summarizes how the information in the paragraph supports the topic.

Ok s "The compound noun, "clincher statement," comes from the word "clinch," which means to "settle an argument" or "finalize a deal." An important part of academic writing, the clincher statement resolves whatever questions or claims were previously put forth."

Explanation:

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b. brooks wrote about the same type of neighborhood in which she grew up.

the correct answer would b,   to show that she was very influential in the democratic party.