Karen knows that when two parallel lines are cut by a transversal, alternate interior angles are congruent and vertical angles are congruent. Which of these can she prove, and how? A. She can prove that alternate exterior angles are supplementary by using the Transitive Property.
B. She can prove that alternate exterior angles are congruent by using the Transitive Property.
C. She can prove that alternate exterior angles are supplementary by using the Symmetric Property.
D. She can prove that alternate exterior angles are congruent by using the Symmetric Property.