An investigation is an example of. A. inquiry
B. pseudoscience
C. the scientific method
D. bias

C) the scientific method / Maybe A) depending on teacher..

Explanation:

A) inquiry - an act of asking for information.

B) pseudoscience - a collection of beliefs or practices mistakenly regarded as being based on scientific method.

C) the scientific method - a method of investigation in which a problem is first identified and observations, experiments, or other relevant data are then used to construct or test hypotheses that purport to solve it.

D) bias - prejudice in favor of or against one thing, person, or group compared with another, usually in a way considered to be unfair.

answer; hydrologic cycle;