Which of the following was an accomplishment of Paul of Tarsus?

AHe convinced Roman leaders to legalize Christianity in the Roman Empire in 313 C.E.

BHe wrote the book of Genesis and created the Manichaeist sect of Christianity.

CHe wrote several letters that appear in the New Testament, and helped to spread Christianity.

DHe was the first follower of Jesus of Nazareth and convinced the original twelve apostles to follow him as well.