Read the excerpt from "Lessons of Dr. Martin Luther King, Jr."

We have witnessed truckloads of grapes being dumped because no one would stop to buy them. As demand drops, so do prices and profits. The growers are under tremendous economic pressure.

We are winning, but there is still much hard work ahead of us.

The details in this passage best support the theme that

standing up for others takes courage and sacrifice.
people can make a positive change by working together.
sometimes people have to be unfair to achieve justice.
it is often difficult to take action against others.