Scuba divers use a red flag with a white diagonal stripe to let other people know the scuba divers are under water. Which angles must be congruent in order for the top and bottom edges of the flag to

Scuba divers use a red flag with a white diagonal stripe to let other people know the scuba divers are under water. Which angles must be congruent in order for the top and bottom edges of the flag to be parallel? A) ∠1 and ∠2 B) ∠2 and ∠3 C) ∠3 and ∠4 D) ∠4 and ∠2