Which of the following lines from king's letter is meant to be interpreted literally?

the quicksand of racial injustice to the solid rock of human dignity.
in any nonviolent campaign there are four basic steps.
there comes a time when the cup of endurance runs over.
men are no longer willing to be plunged into an abyss of injustice.

The correct answer is B or In any nonviolent campaign there are four basic steps.

the correct answer is a "it describes nora and mrs. linde's relationship". opcions b and d are not related to the content of the passage in any way. option c could be appropiate but it does not fully capture the effect of the dialogue, while option a is quite appropiate, since the dialogue not only exemplifies the relationship between the characters, but it also captures the effect in the excerpt. we get to know that mrs linde bosses around and already knows nora.

i would need the available options to be listed to give you an answer.