1. The best statement for reason 6 of this proof is a) ∠A ≅ ∠C b) ∠B ≅ ∠D c) ∠B and ∠D are supplements. d) ∠B ≅ ∠B 2.The best reason for statements 3,5, and 7 in this proof is a) Alternate interior angles are congruent. b) Corresponding angles are congruent c) Alternate exterior angles are congruent. d) Interior angles on the same side of a transversal are supplements. 3. The best statement for reason 8 of this proof is a) ∠B ≅ ∠B b) ∠A and ∠C are supplements. c) ∠B≅ ∠D d) ∠A ≅ ∠C