Scientists conduct scientific investigations for which of the following reasons?
I. to discover new things about the natural world

II. to explain observed phenomena

III. to test the conclusions found in previous research

IV. to test the predictions of current theories

A. I and II only
B. III and IV only
C. I, II, III, and IV
D. III only

the answer is cell division : )

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.

the answer is c.

by: nicholas dooley