Which statement is true regarding monocytes a. they produce antibodies against cancerous cells. b. they have a granular appearance under a microscope. c. they digest pathogens. d. they produce antibodies against microorganisms

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.