Where did the word boo come from, and it's meaning

Boo, including variations such as "bo" or "boh," goes back around 500 years. It seems to be Scottish in origin, but some trace it back to a Greek word that meant "to cry aloud, roar or shout." And some say boo imitates the sound of a sad calf. Booing as a sound of discontent seems to come in to use in the 18th century.

Explanation:

the answer is d. i took the test and its right