Which Statement Demonstrates an Accurate Understanding of the Process of Problem-

Which statement demonstrates an accurate understanding of the process of problem- solving?

A) Experimental approach that tests ideas to decide which methods work and which do not
B) Researchers discover the best possible safe and effective treatments for disease or dysfunction
C) Complex mix of inquiry, knowledge, intuition, logic, experience, and common sense
D) Basic skill of identifying a problem and taking steps to resolve it