For a Two-Tailed Test With $\alpha$ = 005,the Value Is
A)either +1

For a two-tailed test with $\alpha$ = 0.05,the value is

A) either +1.96 or -1.96.
B) both +1.96 and -1.96.
C) either +1.645 or -1.645.
D) different for each df.