From answers shown here, best answer is: c. The Gospels
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The teachings of Jesus are recorded in the New Testament, which consists of the four Gospels, plus the book of Acts and the Epistles (letters to the churches).
The accounts of Jesus' life and direct teachings are found in the Gospels (or "good news" books), which were written by Matthew, Mark, Luke and John. From the standpoint of Christian theology, however, the whole New Testament continues to be the teaching of Jesus, as he gave his apostles authority to write and speak in his name. So, for instance, in one of his epistles, the Apostle Peter wrote, "We did not follow cleverly devised stories when we told you about the coming of our Lord Jesus Christ in power, but we were eyewitnesses of his majesty" (2 Peter 1:16). The apostles firmly believed they were continuing the mission and teaching of Jesus in the world, for Jesus had promised them, "The Holy Spirit, whom the Father will send in my name, will teach you all things and will remind you of everything I have said to you" (John 14:26).
