Becca and her research team were interested in studying whether different methods of math instruction supported different levels of math comprehension skills in first-grade students. They designed an experiment where they tried to find out which of two math instruction methods might yield better math comprehension results. They randomly selected two first-grade classrooms and provided one or the other math instruction method. The study lasted 8 weeks and the math comprehension level was assessed three times during the study. The teachers predicted that the different instruction methods would result in different comprehension levels. The study represented an example of a/an: Question 3 options: A) Simple descriptive quantitative research design B) Experimental research design C) Qualitative research design D) None of the above