Why did migrant farm workers on strike in California in the late 1960s ask people to boycott grapes?
A) The grapes were picked by immigrants who had come to the U.S. illegally
B) The grapes were treated with pesticides
C) Strike organizers hoped to start a union movement among migrant workers
D) The workers wanted to put pressure on growers to meet their demands for better pay and better working conditions
This is a very difficult question to answer because both C and D appear to be plausible answers. I would suggest that you look in your textbook or in your notes to see if there is an answer that your book/teacher says is the right one.
I would argue that D is the best answer here. Cesar Chavez's movement was certainly meant largely to create a union that would represent migrants who did the manual labor on farms. However, the point of boycotting grapes was to put pressure on the growers to meet the demands of Chavez and his movement.
So, either C or D really could be correct. Chavez wanted to create a union, but the point of the union was to get better working conditions and wages for the workers.