Answer:
A.
Step-by-step explanation:
I see the bottom vertices are (x1, y1) and x2, y1).
I assume the top vertices are (x1, y2) and (x2, y2).
If that is correct, the the lengths of the top side and bottom side are x2 - x1.
The lengths of the left side and right side are y2 - y1.
Since there are two horizontal sides and two vertical sides, the perimeter is:
2(x2 - x1) + 2(y2 - y1)
Answer: Choice A.
