According to bartolomé de las casas:
a. spain needed to institute a more humane system of native american slavery in order to avoid offending pope paul iii.
b. converting native americans to anything but catholicism would lead to their death.
c. spain had caused the deaths of millions of innocent people in the new world.
d. despite his opposition to slavery, he needed to keep his slaves so that he would have time to devote to working for abolition and emancipation.
e. slavery needed to be eliminated entirely from the earth.

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.

i am pretty sure it is d.

the anti federalists was a movement that was opposed to the creation of a us federal government. although they were not as organized as the federalists, they also had a large group of leaders, especially in state politics.

the statement "now, in a large extended country, it is impossible to have a representation, possessing the sentiments, and of integrity, to declare the minds of the people” represents the concerns of the anti federalists.

they strongly believed that the federalists were representing the interests of aristocratic elements of society at the expense of the majority of ordinary people, who lived in a rural society.

their fear for the creation of a strong federal government and the president’s power of veto in their opinion would create a tyrannical rule that would dominate the people. they defended the importance of restraining the government’s power towards people at any cost.