A Researcher Asks Extraverts and Introverts to Work on a Series

Multiple Choice

A researcher asks extraverts and introverts to work on a series of math problems while listening to loud or soft music. Based on past research, we would expect to find that

A) the extraverts do better on the test, regardless of the music level.
B) the introverts do better when listening to loud music, the extraverts better when listening to soft music.
C) the extraverts do better when listening to loud music, the introverts better when listening to soft music.
D) introverts and extraverts do equally well regardless of how loud the music is playing.