When +1645 Is Used as the Critical Value Instead of ±1

When +1.645 is used as the critical value instead of ±1.96 and the criterion probability is 0.05 in both cases,

A) the total probability of the region of rejection is decreased.
B) the total probability of the region of rejection is increased.
C) the region of rejection is all placed in the positive z-distribution tail.
D) the region of rejection is all placed in the negative z-distribution tail.