Regarding the Decision to Use Either a Directional or Nondirectional

Multiple Choice

Regarding the decision to use either a directional or nondirectional alternative hypothesis, most researchers

A) prefer to use directional because of the increase in statistical power.
B) use nondirectional alternative hypotheses because this allows you to reject the null if your finding occurs in the opposite direction from your prediction. That is, it allows you to discover something new.
C) typically use nondirectional alternative hypotheses if the significance level is .05 and directional if it is .01.
D) have no convention at all in practice because there are pros and cons to each choice.