Answer:
C. a reflection across the x-axis followed by a 180° rotation around the origin
Step-by-step explanation:
You can figure out the answer to this problem by going through the steps in your head. You can tell the answer is C because if you flip the quadrilateral ABCD over the x-axis and then imagine rotating it around the origin by 180°, it would end up where A'B'C'D' is. If you can't imagine this, you can go onto a graphing calculator like desmos and do the transformations to see if they work.
