triangle XYZ is shown below.
3
a
X
William wants to create Triangle X'Y'Z' by using a transformation of Triangle XYZ. He also wants XY | X'Y'. Which transformation can William use?
reflect Triangle XYZ across the y-axis and translate 1 unit up
O rotate Triangle XYZ 90° counterclockwise about the origin
O translate Triangle XYZ 4 units to the right
reflect Triangle XYZ across the x-axis