To Compare the Effect of Weather on Sales of Soft $\neq$

Multiple Choice

To compare the effect of weather on sales of soft drinks, a soda manufacturer sampled two regions of the country with the following results. Is there a difference in sales between the 2 regions?
i. The null hypothesis is p_a - p_b = 0.
ii. The alternate hypothesis is p_a - p_b $\neq$ 0.
iii. Using the 1% level of significance, the critical value is $\pm$ 2.58.

A) (i) , (ii) , and (iii) are all correct statements.
B) (i) and (ii) are correct statements but not (iii) .
C) (i) and (iii) are correct statements but not (ii) .
D) (ii) and (iii) are correct statements but not (i) .
E) (ii) is a correct statement but not (i) and (iii) .