Which book of the Bible details Paul's first missionary journey?

The correct answer is C, as the book of Acts chapters 13 and 14 specifically detail Paul's first missionary journey. This journey is a significant event in the early church, marking Paul's initial efforts to spread the Gospel beyond the Jewish communities into Gentile territories.

In Acts 13, the narrative begins with the Holy Spirit directing the church at Antioch to set apart Saul (Paul) and Barnabas for the work of ministry. This chapter outlines their travels to various locations, including Cyprus and parts of Asia Minor, where they encounter both acceptance and opposition.

Acts 14 continues to record the developments of this journey, showing how they established churches, performed miracles, and faced persecution. The detailed accounts in these chapters provide an invaluable perspective on the methods, challenges, and theological teachings during Paul's early evangelistic efforts.

The other chapters mentioned do not focus specifically on Paul's first missionary journey; Acts 10 discusses Peter's vision and the initial opening of the Gospel to Gentiles, Acts 12 recounts the persecution of the early church and Peter's miraculous escape from prison, and Acts 15 pertains to the Jerusalem Council's decisions regarding the inclusion of Gentiles in the faith.