A conjecture and the two-column proof used to prove the conjecture are shown. Drag an expression or phrase to each box to complete the proof.

Statement: Reason:
1. ∠1 is supplementary to ∠2. Given
2. ___Response_ Definition of supplementary
3. BD−→− bisects ∠ABC. Given
4. m∠2 = m∠3 ___Response_
5. ___Response_ ___Response_
6. ∠1 is supplementary to ∠3. Definition of supplementary

Options:
(Definition of bisector)
(m∠1 + m∠2 = 180*)
(m∠1 + m∠3 = 180*)
(Substitution of property)