Answer:
B. Experimental
Step-by-step explanation:
According to a different source, these are the options that come with this question:
A. Correlational
B. Experimental
C. Naturalistic
D. Observational
The type of research that Dr. James is conducting is experimental research. This is a type of research that is commonly conducted in the sciences. When we conduct an experiment, we use two sets of variables. The first set is a constant, and it is employed to measure the differences of the second set. An experiment is successful is the researcher can show that the change in the variable is based only on the manipulation of the constant variable.