Can someone please answer and explain this?

i am positive it is c. condensing but i may be wrong

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

answerpotassium hydroxide preparation;

treatment of fungal infections usually follows diagnosis confirmed by potassium hydroxide preparation or culture;