IF YOU ANSWER THIS QUESTION RIGHT YOU WILL GET 20 PTS!!!! OR YOU MAY NOT SAYING YOU WILL GET BRAINLIES!!!!!!

When a polygon reflects across the y-axis, how do the coordinates of the points change?
A) The sign of the x-coordinate changes.
B) The sign of the y-coordinate changes.
C) The sign of both the x and y coordinates change.
D) The x and y coordinates are switched and the signs of both change.