Here are the answers to the questions:
Question 4. C. Paul
Paul is considered the most important person in the early spread of Christianity to non-Jews as well as Jews.
Question 5. B. epistle
An epistle is like the long letters Paul wrote to the people he had converted, answering their questions and settling problems.
Question 6. A. catacombs
To avoid persecution, early Christians would meet, hide out, and bury their dead in catacombs.
Question 7. B. Peter
Peter was the uneducated fisherman, known as the first apostle, who Jesus chose to carry on his work.