Question

Who wants a medal?
What is the missing step in the given proof?


A.
PCQ and ACP are supplementary by the Linear Pair Theorem.
B.
For parallel lines cut by a transversal, corresponding angles are congruent, so ACB PCQ.
C.
OCP BCD by the Vertical Angles Theorem.
D.
For parallel lines cut by a transversal, corresponding angles are congruent, so OCP ABC.
E.
For parallel lines cut by a transversal, corresponding angles are congruent, so OCA CBD.