The Choice Between a One-Tailed Test and a Two-Tailed Test $H_0$

Multiple Choice

The choice between a one-tailed test and a two-tailed test

A) will affect the way $H_0$ is stated
B) should be made after learning the location of X
C) is determined by the logic of the study rather than by the outcome of the data
D) is an optional matter; some statisticians prefer (b) and some prefer (c)