Which section of the article highlights the idea that sometimes grassroots movements might not be very successful?

This question is incomplete, here´s the complete question.

Read the article "Taking it to the streets: Grassroots activism in the United States", by Gale, Cengage Learning, adapted by Newsela staff.

Which section of the article highlights the idea that sometimes grassroots movements  might not be very successful?

(A) "The Civil Rights Movement"

(B) "Teaching A Lesson"

(C) "Four Dead In Ohio"

(D) "Occupy Wall Street"

(D) "Occupy Wall Street"

Explanation:

The "Occupy Wall Street" section explains that that movement could be considered a failed event considering that it was constantly raided by the police until they cleared every protester from the area. Furthermore, it didn´t change politics nor government policies. However, it did establish a much-needed debate about economic justice.