Points R and S on the coordinate grid below show the positions of two midfield players of a soccer team: Which statement best describes the relationship between the positions of the two midfield players? (1 point)

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.