:

 	
  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