The correct answer is C) the message of Christianity spread widely.
What resulted from the Apostles' effort was that the message of Christianity spread widely.
According to the Bible, after the death of Jesus, the Apostles kept on with evangelization and continued to spread the teachings of Jesus in different regions of the Middle East and more. Thanks to their efforts, Christianity reached many new places. Sometimes, the Apostles had to endure harsh times such as the case of Peter and Paul, that were incarcerated. Although that served Paul to write many of his letters during prison time.