The correct answer to this open question is the following.
Unfortunately, you forgot to include the text. Without the text, we do not know what is the information you are talking about. Without the text, we do not know what is the content of part "A."
However, trying to help, we can comment on the following.
The main idea of the text titled "Before Rosa Parks, there was Claudette Colvin" is that Rosa Parks was the African American woman who initiated the peaceful demonstrations and protests in Montgomery, Alabama, and other parts of the South of the United States. She did so when she decided to seat in the white people's seats on the bus. After Rosa Parks was arrested, many protests started in Montgomery.
Claudette Colvin was the first woman that started to disobey the race legislation but was not as famous as Rosa Parks because the members of the movement considered that Parks was a better "face" to lead the movement.