A.
paddings: 20px space up, 30px space down, 40px space left and right
B.
paddings: 20px space up, 40px space down, 30px space left and right
C.
margins: 20px space up, 30px space down, 40px space left and right
D.
margins: 20px space up, 40px space down, 30px space left and right