The correct answer should be A. Whomever.
This is because this can be paraphrased as "the instructor has picked him" not "the instructor has picked he". Him corresponds to whomever while he corresponds to whoever.
Answer: don't give them to teenagers because they are really bad.
The word ambivalence means confused feelings.
The ancient Babylon (located in west Asia), ancient Egypt (located in north Africa), the ancient India， which is located in the South Asia and China which is located in east Asia.
