A. Assume the null hypothesis is true. Then, if the test just made is repeated, the chances that its z-value will be less than or equal to -2 is about 2.5%

B. The chance that the null hypothesis is true is about 2.5%.

Then

a. A is true, but B is not necessarily true

b. B is true, but A is not necessarily true

c. A and B are both true

d. neither A nor B are necessarily true