Read the excerpts from "Freedom Walkers” by Russell Freedman.

Excerpt 1

By now, it was late Thursday evening. Nixon and the Durrs left and went home. Attorney Fred Gray, meanwhile, had learned about Parks’s arrest, had spoken with Rosa, and agreed to represent her. Then he called Jo Ann Robinson, whom he knew from the Claudette Colvin case, and Robinson, in turn, notified several fellow teachers who were members of the Women’s Political Council. "It was all happening quickly,” Gray recalled. "The mood was electric. This was the beginning of the Montgomery Bus Boycott.”

Excerpt 2

While the women were working, Robinson called Nixon at home to inform him of their plans for a boycott. He too had been busy throughout the night, phoning Montgomery’s black ministers and other civic leaders, urging them to attend a meeting Friday evening to mobilize support for both the boycott and for the legal defense of Rosa Parks.

Which sentence best explains how these excerpts develop the central idea that people were eager to help?

Both excerpts give examples that show the level of the participants’ involvement.
Both excerpts reveal the thoughts of the people involved in organizing the boycott.
Both excerpts name the organizations that became involved in the boycott.
Both excerpts provide direct quotes from some of the original organizers.