Answer:
pick D
Explanation:
A is incorrect. Vertical angles are angles opposite each other where two lines cross. We have 3 lines.
B the 'supplementary' part isn't needed
C The angles don't need to add to 180; that's what supplementary means
D If two lines are cut (intersected) by a transversal (that diagonal line going through it) so the corresponding angles (angles 1 and 2) are congruent (same measure), then the lines are parallel.