Answer:
c. Spain had caused the deaths of millions of innocent people in the New World.
Explanation:
Bartolomé de Las Casas strongly opposed violence towards Native Americans and did not understand how was it possible that God let them suffer in such way. While others considered that God gave the New World to Europeans so that they could unleash a war against heretics who worshiped other figures, he thought that it was a test to show how Spain could teach through mercy. But evidently, Spain completely failed such a test.