They were successful for numerous reasons. One is that there were already a lot of Europeans there who were willing to help in the spread of Catholicism. Another is that they were mostly experienced in military conquest so if anyone actually tried to oppose the spread of Catholicism from the natives, they would be punished severely since no one could oppose the missionaries.
Answer is d, decreased power to the monarchs.
many things the government can do to protect the rights of its citizens. One thing the government can do is to guarantee these rights in a written document such as the Constitution. The first ten amendments to our Constitution, called the Bill of Rights, guarantee basic freedoms of the American people.