"Parallelogram ABCD is reflected over the x-axis. What rule shows the input and output of the reflection, and what is the new coordinate of A'?
a.(x,y)→(y,−x); A' is at (1, 5)
b.(x,y)→(−y,x); A' is at (−1, −5)
c.(x,y)→(−x,y); A' is at (5, 1)
d.(x,y)→(x,−y); A' is at (−5, −1)"