The Rejection Region for Testing H₀ $\mu$ = 80 VsH₁ $\mu$ $\lt$

The rejection region for testing H₀: $\mu$ = 80 vs.H₁: $\mu$ $\lt$ 80,at the 0.10 level of significance is:

A) z > 1.96
B) z < 0.90
C) z > 1.28
D) z < -1.28