The sentence that best expresses the central idea of the excerpt is Nixon felt Parks was the perfect person to challenge segregation on buses.
What is the central idea?
The primary idea, sometimes known as the central idea, is a succinct synopsis of the entire plot. Usually, we use one sentence to convey the main point. The subject and the message are distinct from the fundamental idea.
Based on the excerpt, it's clear that Nixon was interested and thought Rosa Parks would make a competent defense attorney. It's important to remember that Nixon reportedly thought Parks would be the ideal candidate to fight bus segregation, highlighting her contribution to the fight against racial discrimination.