Identify the correct justification for each step, given that ∠2 and ∠3 are complementary, and m∠1=m∠3. 1. ∠2 and ∠3 are complementary
2. m∠2+m∠3=90°
3. m∠1=m∠3
4. m∠1+m∠2=90°
5. ∠1 and ∠2 are complementary

A. 1. Given
2. Def. of Comp. ∠s
3. Given
4. Subst. Prop. of =
5. Def. of Comp. ∠s

B. 1. Given
2. Add. Prop. of =
3. Given
4. Sym. Prop. of =
5. Def. of Comp. ∠s

C. 1. Given
2. Def. of Comp. ∠s
3. Given
4. Trans. Prop. of =
5. Add. Prop. of =

D. 1. Given
2. Def. of Comp. ∠s
3. Given
4. Subst. Prop. of =
5. Add. Prop. of =