Hi mike, I don’t know how to answer questions like these; would you tell me the right way to do so?

In the xy-coordinate plane, point P is the reflection of the point with coordinates (3,1) across the line y=x. Point T is the reflection of point P across the y axis. What are the coordinates of T?

A) (-3,1)

B) (-1,-3)

C) (-1,3)

D) (1,-3)

E) (3,-1)