Marshman et al. (2018) analyzed mean self-efficacy scores among participants at the end of physics 1 for differences based on gender (students were classified as male or female), physics knowledge (students were separated into three knowledge levels), and an interaction between these variables. Select the appropriate ANOVA to analyze these factors. a. Two-way within-groups ANOVA b. Two-way between-groups ANOVA c. Two-way mixed ANOVA d. One-way between-groups ANOVA