Concept:Paul teaches that the Holy Spirit unites all believers into one body.Explanation:In 1 Corinthians 12:13, Paul writes:"For by one Spirit are we all baptized into one body, whether we be Jews or Gentiles, whether we be bond or free; and have been all made to drink into one Spirit."This means the Spirit baptizes believers into the one body of Christ, the Church.Answer:D. baptized into one body