If a Repeated-Measures Analysis of Variance Usually Has an Error

Multiple Choice

If a repeated-measures analysis of variance usually has an error term that is smaller that the error term in the corresponding between-subjects design, then we can assume that

A) repeated-measures designs have less power.
B) repeated-measures designs have greater power.
C) there are no differences due to power between the two kinds of designs.
D) neither design has very much power.