What is Martin Luther King Jr's purpose for using the metaphor "chains of discrimination" within his speech?
"But one hundred years later, the Negro still is not free. One hundred years later, the life of the Negro is still sadly crippled by the manacles of segregation and the chains of discrimination. One hundred years later, the Negro lives
on a lonely island of poverty in the midst of a vast ocean of material prosperity. One hundred years later, the Negro is still languished in the corners of American society."

A He wants people to see him chained to the government buildings and recognize that he won't give up until he gets his way.

B He believes there are still some people who are slaves with the U. S. who are literally still being held by chains.

C He believes that slavery is unjust and should be abolished.

D He compares being discriminated against to being held in chains because both keep people from being completely free.