Suppose you are testing to see whether the proportion of males who voted in the last election differs from the proportion of females who voted in the last election. Which of these is NOT a correct way to write the null hypothesis? 

A. The proportion of males in the population who voted in the last election is the same as the proportion of females in the population who voted in the last election. 

B. π_M = π_F 

C. π_M − π_F = 0 

D. p?_M = p?_F 

E. All the above are correct.