From the words or group of words lettered A to D, choose the word or group of words that best completes the sentence. The man tried to cash in ........ the ...

From the words or group of words lettered A to D, choose the word or group of words that best completes the sentence.

The man tried to cash in ........ the boy's ignorance.

Answer Details

In this sentence, the phrase "cash in" means to take advantage of, exploit, or benefit from something. The preposition that appropriately goes with it is "on". Therefore, the correct option is letter C, "on".