J.R. S. answered 01/18/23
Ph.D. University Professor with 10+ years Tutoring Experience
Let's apply the basic definitions of basic and applied research to each of the options and see what we come up with.
Basic research: helps to expand our existing knowledge
Applied research: helps to provide a solution to an existing problem
Of course, you can find other definitions, but these are simple and basic concepts. Applying these to the given options:
A. Seems to be providing a solution to an existing problem. I'd call this applied
B. Seems to trying to expand existing knowledge for use in the future. I'd call this basic
C. Seems to be providing a solution to an existing problem. I'd call this applied
D. Seems to be providing a solution to an existing problem. I'd call this applied
So, this is my approach to answering this question. Maybe others will have alternative approaches.