Since Robert Scott and his crew did not survive their trek to the South Pole, what unusual purpose(s) were served by the captain’s log? A. It showed how the men behaved during their final days.
B. It explained to Scott’s widow what happened to him.
C. It helped other explorers analyze the fate of the men.
D. It provided a detailed map of his route to the South Pole.

I think it’s c because it helped other explorers analyze the fate of the men as listed here.

I’m pretty sure it’s C

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form