Why did Spanish monarchs oppose the spread of Protestantism? A. They wanted people to keep speaking Latin. B. They viewed it as a threat to their authority. O C. They believed it had caused the Black Death. O D. They thought that only adults should be baptized.

Correct answer is B. They viewed it as a threat to their authority.

Explanation:

Option A is not correct, as people were speaking Spanish anyway. Only members of clergy were speaking Latin.

B is correct as Catholic church was a strong ally of Crown. They were afraid that Protestantism will lower their authority, as it allowed more freedom.

C is not correct as Black Death happened in 14th Century.

D is not correct. This is actually the belief of certain Protestants, like Baptists.

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