The figure below shows parallel lines cut by a transversal:
Which statement is true about ∠1 and ∠2?
A) ∠1 and ∠2 are congruent because they are a pair of vertical angles.
B) ∠1 and ∠2 are congruent because they are pair of corresponding angles.
C) ∠1 and ∠2 are complementary because they are a pair of vertical angles.
D) ∠1 and ∠2 are complementary because they are pair of corresponding angles.