In ΔABC shown below, segment DE is parallel to segment AC : The following two-column proof with missing statements and reasons proves that if a line parallel to one side of a triangle also intersects the other two sides, the line divides the sides proportionally:

Which statement and reason accurately completes the proof? (5 points)

a
4. ΔBDE ∼ ΔBAC; Side-Angle-Side (SAS) Similarity Postulate
5. ∠B ≅ ∠B; Reflexive Property of Equality

b
4. ∠B ≅ ∠B; Reflexive Property of Equality
5. ΔBDE ∼ ΔBAC; Angle-Angle (AA) Similarity Postulate

c
4. ΔBDE ∼ ΔBAC; Side-Angle-Side (SAS) Similarity Postulate
5. ∠A ≅ ∠C; Isosceles Triangle Theorem

d
4. ∠A ≅ ∠C; Isosceles Triangle Theorem
5. ΔBDE ∼ ΔBAC; Angle-Angle (AA) Similarity Postulate