Concept:The correct choice is the natural English phrasal verb that fits the sentence.
Explanation:“Make up” is a standard phrasal verb with several common meanings.
It can mean to form or compose, to invent, or to settle a disagreement.
The other combinations, “make in,” “make by,” and “make through,” are not used as standard phrasal verbs in this context.
Therefore, “make up” is the only option that completes the sentence correctly and idiomatically.
Answer:C. make up