Candace Conducts a Study to Examine the Effect of a Professional

Candace conducts a study to examine the effect of a professional development program on teachers' content knowledge. Half of the teachers are randomly assigned to participate in the program (the other half are controls) . All teachers are then tested on their content knowledge each month over the course of the academic year. Which ANOVA model is most appropriate for analysis of these data?

A) One-factor random-effects model
B) Two-factor random-effects model
C) Two-factor mixed-effects model
D) One-factor repeated measures design
E) Two-factor split-plot design