Answer: D. repeated-measures ANOVA.
Step-by-step explanation:
Repeated-measures ANOVA is used for studies that investigate either changes in mean scores over three or more time points or change in mean scores under three or more conditions.
In the case above Dr. Rounder wants to test the effects of social setting on studying under three different conditions; a quiet library, their home while listening to music, and a noisy cafeteria. For each person the measurement were derived under each of the conditions which makes it a repeated-measures ANOVA.