The rejection region for a two-tail test that uses the standard normal distribution is that area under the distribution lying
a. between 0 and the positive cutoff value for Z.
b. between the positive cutoff value for Z and the negative cutoff value for Z.
c. between 0 and the negative cutoff value for Z.
d. to the right of the positive cutoff value for Z and to the left of the negative cutoff value for Z.