If you wanted to examine whether television viewing through social learning differs based on students' grade in school (i.e. ,first,second,third) ,what is the independent variable of interest?

A) grade level
B) television viewing
C) students
D) school

The independent variable of interest is the factor that is being manipulated or observed in the study. In this case, the independent variable is the grade level of the students, as it is being used to examine the differences in television viewing through social learning. The other options (B, C, and D) are not independent variables in this study.