"A Test with Two Rejection Regions That Is Based on the Alternative

Multiple Choice

"A test with two rejection regions that is based on the alternative hypothesis that research reveals an effect (e.g.that two means are different) .The nature of any departure from randomness (e.g.which mean will be larger) is not specified." What is this a glossary definition of?

A) A one-tailed test.
B) A two-tailed test.
C) Two one-tailed tests.
D) A bimodal test.
E) A binomial test.