15. In this figure, l1 [m Jessie listed the first two steps in the proof that 21+ 22 + 3 = 180° 1 3 [ Step Justification 1. 2. 2325 What justification can lessie give for steps 1 and 2? WA the A Alternate Interior Angles are congruent B. Corresponding Angles are congruent C. Vertical Angles are congruent D. Alternate Exterior Angles are congruent