What is the next step in the given proof? Choose the most logical approach. A. Statement: m 1 + m 2 + 2(m 3) = 180° Reason: angle addition B. Statement: m 1 + m 3 = m 2 + m 3 Reason: Transitive Property of Equality C. Statement: m 1 = m 2 Reason: Subtraction Property of Equality D. Statement: m 1 + m 2 = m 2 + m 3 Reason: Substitution Property of Equality E. Statement: 2(m 1) = m 2 + m 3 Reason: Substitution Property of Equality
