From the words or group of words lettered A to D, choose the one that best completes each of the following sentences. This is an improvement ......your last...

From the words or group of words lettered A to D, choose the one that best completes each of the following sentences.
This is an improvement ......your last essay

Answer Details

The correct answer is "on". The sentence is asking if there has been an improvement in the essay compared to the previous one. The preposition "on" is used to indicate a comparison between two things, in this case, between the current essay and the previous one. The prepositions "with", "by", and "for" would not convey the intended meaning of the sentence.