What is the missing step in the given proof?

A. < PQC and B. For parallel lines cut by a transversal, corresponding angles are congruent, so

C. D. For parallel lines cut by a transversal, corresponding angles are congruent, so

E. For parallel lines cut by a transversal, corresponding angles are congruent, so

The missing step is A.

Step-by-step explanation:

There are several properties about parallel straight lines that you need to bear in mind:

The angles are congruent, in other words they are the same. Angles on top of the lines are equal. Similarly, angles beneath the lines are equal.

The angles form Z angles with the transverse line. These angles are equal as well.

These properties make parallel lines to produce equal angles. Hence the proof.