The first sentence gives the main idea of the selection
One of Cesar Chavez accomplishments as a civil right activist was making the Delano, California growers, pay the right amount of money the farm worker deserved. He was also the first person in America to make a collective bargain agreement contract with growers and farm workers
B. Ask the reference librarian.
The librarian is there to help you find information. She or he knows what information you need should be where.
