Answer:
The sentence that is an example of paradox is letter D) She tried to quiet the silence.
Explanation:
A paradox is a statement that may seem to be contradictory, illogical, or simply absurd. Still, after investigating further or after merely waiting for some time, the statement can prove itself true and well founded. A famous example is "less is more." Even though the ideas of less and more are completely opposites, the statement can be truthful in certain situations. For example, a person who talks less is often seen as more intelligent.
Among the option provided in the question, the one that is a paradox is letter D) She tried to quiet the silence. At first, we may think that silence does not need to be quieted, or that it is impossible to quiet something that is, essentially, quiet. However, depending on the context, this sentence might make perfect sense. Suppose the moment of silence comes after a moment of trouble or of intense emotions. Silence may become quite oppressive in such context, when the person is left alone with her thoughts after commotion. She may try to do something to quiet the silence, to make it less tense, less imposing, probably by finding something to do or to listen to.