Which of these is the statement of the zero product rule?
O A. If a·b = 0, then a = 0 and b= 0.
O B. If a• b = 0, then either a = 0 or b = 0, or both.
C. Ifa:b= 0, then a = 0.
D. If a·b = 0, then either a = 0 or b = 0, but not both.