Answer:
C. The shorter of the two men was more generous with his compliments.
Step-by-step explanation:
Comparative and superlative forms of adjectives are used for the comparison of the differences between any two objects. Additionally, "comparative" is identified by the -er in the adjective while the superlative goes by the -est. So, from the options given, sentence (C) uses the comparative form of 'short', for the comparative form of short is 'shorter' and it's superlative degree 'shortest'.
"The shorter of the two men was more generous with his compliments."