When Used in the Analysis of a Pretest-Posttest Design, the ANCOVA

Multiple Choice

When used in the analysis of a pretest-posttest design, the ANCOVA:

A) Changes a mixed design to a single-factor design
B) Uses differences in pretest scores to adjust the posttest scores
C) Analyzes only the posttest scores after adjustments have been made with the pretest scores
D) All of the above