You can look at the etymology of a word to learn

a. how to pronounce it.

b. some alternate spellings.

c. some synonyms for it.

d. what its origins are.

Etymology is the study of the origin and development of words. You can look at the etymology of a word to learn what its origins are. The correct answer is option D. English words are developed from several language origins and that in time, were improved and became part of the English language. It is necessary to look at the etymology of the word to know its meaning and what language it came from.