They had few essential supplies to begin . . . . . . . . so they had to improvise. A. of B. for C. with D. on

The correct answer is C. with.

The sentence is about how the people had to improvise because they had few essential supplies. The word “with” is the most logical word to use in this sentence because it indicates that the people had to use what they had available to them in order to survive.

The other options are not as logical. The word “of” is used to indicate possession or a part of something. The word “for” is used to indicate a purpose or a reason. The word “on”

In this sentence, the people did not have possession of essential supplies, they did not have a purpose for the supplies, and they were not in a particular location. They simply had to use what they had available to them in order to survive. Therefore, the word “with” is the most logical word to use in this sentence.