Final answer:
If WZX and WZV are a linear pair, they are supplementary angles.
Step-by-step explanation:
If WZX and WZV are a linear pair, then they are adjacent angles that form a straight line. A linear pair of angles is always supplementary, which means that the sum of their measures is equal to 180 degrees. So, the correct statement is A) WZX and WZV are supplementary angles.