Concept:The New Covenant is God’s promise to put His law in the heart of His people and to give them the Holy Spirit.Explanation:Believers today are partakers of the New Covenant through the gift of the Holy Spirit.It is the Holy Spirit who makes the promises of God real in the life of a believer.This is not received through external ceremonies, church obedience, or the sacraments alone.Rather, the Spirit comes and lives in the believer as proof of the new relationship with God through Christ.Answer:A. the gift of the spirit