Select the correct answer. Given: ∆ABC is an isosceles triangle where AB = BC Prove: m∠BAC = m∠BCA Statement Reason 1. Let ∆ABC be an isosceles triangle where AB = BC. given 2. Create point D on side so that bisects ∠ABC as shown. constructing an angle bisector 3. m∠ABD = m∠CBD 4. BD = BD Reflexive Property of Equality 5. ∆ABD ≅ ∆CBD SAS 6. m∠BAC = m∠BCA Corresponding angles of congruent triangles have equal measures. What is the reason for statement 3 in this proof? A. definition of angle bisector B. Alternate Interior Angles Theorem C. Corresponding Angles Theorem D. Corresponding angles of congruent triangles are congruent.