To be mentally healthy, people must have self-respect. People can maintain self-respect only by continually earning the respect of others they esteem. They can earn this respect only by treating these others morally.
It is more of a cause and effect relation. We can cross out the answers which refer to an effect that returns a cause ( as specified in the question).
Give Respect to those they esteem => Get respect from these esteemed people => Have self-respect => Mentally healthy person.Don't miss the esteem part.Which of the following conclusions can be properly drawn from the statements above?
A. People who are mentally healthy will be treated morally by others.
It's an inference and opposite in the cause and effect direction. WRONG
B. People who are mentally healthy will have treated morally those they esteem.
Sounds GOOD. SKIP
C. People who are mentally healthy must have self-respect in order to be treated morally by others.
WRONG, and a trap. Its quite tempting for the first part matches the question.
People who are mentally healthy must have self-respect Right but the relation is opposite as given by the question.
D. People can expect to be treated morally by others only if they esteem these others.
It is quite right but loose on the part that the others must be someone they idolized, we can't infer outside the passage. This is quite a convoluted sentence, as to esteem( respect) other is quite different to provide esteem( respect) to the one whom you esteem( idolize).
WRONG
E. People who have self-respect seldom treat morally those they esteem. It is blatantly wrong.
B is right . Also, it quite abridge the whole argument, by showing a relation between the extreme ends, which makes it a better option.