The correct answer is option D
The character relationship that best shows how colonizers took advantage of differences between native populations is the one between Caliban and Ariel, because they hate each other even though they are both slaves.
Ariel is a good servant to Prospero, whereas Caliban hates his and plans to kill him.
Prospero pretends to be good to Ariel, promising freedom. He mistreates Caliban because of his disobedience.