Answer:
The right choice is:
b. the Christian church preserved libraries and taught monks and others to read and write.
Step-by-step explanation:
With the use of Latin as its official language and being active in the preservation of classical culture , the Christian Church played a fundamental role in education and learning. Very few people could read and write in the Middle Ages and the clergy was among them. Scholars used Latin to write their works, many of them were also church members.