Anything that says congruent line segments using this figure is incorrect. There are no givens that indicate any congruency of segments. So both A and B are incorrect.
PRT and QTS are vertically opposite and are equal. All vertically opposite angles are equal to the angle across from them. C must be your answer.
PRT might Be equal to QTS. Most of the time this will not be true. D is not universally the answer.
The answer is D. All you have to do is add all of the angles for each choice you're given. It has to add up to exactly 180, because every triangle is 180 degrees.
