What is the mapping rule for a 180° rotation? (x, y) → (y, x) (x, y) → (−y, x) (x, y) → (y, −x) (x, y) → (−x, −y)
A - (x, y) → (y, x)
B - (x, y) → (−y, x)
C - (x, y) → (y, −x)
D - (x, y) → (−x, −y)