Which statement is true about ∠3 and ∠4? A. ∠ 3 and ∠4 are congruent because they are a pair of alternate exterior angles. B. ∠3 and ∠4 are complementary because they are a pair of alternate exterior angles. C. ∠3 and ∠4 are complementary because they are a pair of alternate interior angles. D. ∠3 and ∠4 are congruent because they are a pair of alternate interior angles.