He became enamored …… her grace when he first saw her dance. A. with B. of C. by D. in

The correct answer is (A).

The word “enamored” means “to be filled with love or admiration.” In this sentence, the man is filled with love and admiration for the woman’s grace. The preposition “with” is used to indicate the object of the man’s love and admiration.

The other options are incorrect because they do not make sense in the context of the sentence. The preposition “of” is used to indicate possession or ownership. The preposition “by” is used to indicate the agent or cause of an action. The preposition “in” is used to indicate location or position.

Here are some examples of how the other prepositions could be used in a sentence:

• He was the owner of the house.
• The car was driven by the man.
• The cat was hiding in the box.