By what authority do churches of Christ have committees composed of elders and deacons?

QUESTION: By what authority do churches of Christ have committees composed of elders and deacons?

ANSWER: By the authority of the New Testament (I Timothy 3:1-13; Titus 1:5-9; Philippians 1:1; Hebrews 13:7,17; I Peter 5:1-3)!