To Better Help My Students, I Conduct an Experiment Examining

Multiple Choice

To better help my students, I conduct an experiment examining the relationship between the students' average grade in the class (from 0 to 100) and the number of hours they spend socializing with friends. It is determined that the more hours that students socialize, the lower their grade. What kind of research is this?

A) experimental
B) correlational
C) survey
D) case study