Answer :
Answer: A) They inhibit the spread of knowledge.
Explanation: In the given excerpt we can see Voltaire suggesting that the men of the Inquisition, inhibited the spread of knowledge, we can see that because the aliens learned amazing things, and they were planning to print it and spread it among the people of the period, but the men of the Inquisition, didn't agree with most of the ideas or propositions, so they prevented the ideas to be published.