Points R and S on the coordinate grid below show the positions of two midfield players of a soccer team:
Coordinate grid shown from negative 4 to positive 4 on x-axis and negative 4 to positive 4 on y-axis. From the origin, point R is 1 unit to the left and 3.5 units down. From the origin, point S is 1 unit to the left and 3.5 units up.
Which statement best describes the relationship between the positions of the two midfield players?

A. S is R reflected across the y-axis; only the signs of the x-coordinates of R and S are different.
B. S is R reflected across the y-axis; only the signs of the y-coordinates of R and S are different.
C. S is R reflected across the x-axis; only the signs of the x-coordinates of R and S are different.
D. S is R reflected across the x-axis; only the signs of the y-coordinates of R and S are different.