Answer:
C) Experimental research is the right answer.
Step-by-step explanation:
Experimental research gives the researchers high levels of control because the research is based on children. It will be easy, therefore, to isolate essential variables hence make it easier to determine the required outcome. With this method, it is easier to separate each variable from the products based on the capability of the children learning capacity.
The subject matter involved is not limited on the discussion topic. Similarly it applies on diverse field under different situations.