PICO is a mnemonic used to describe the four elements of a good clinical research question. PICO stands for:
A. P = Population; I = Intervention; C = Comparison; O = Outcome
B. P = Population; I = Intervention; C = Confounding; O = Outcome
C. P = P-value; I = Inference; C = Confounding; O = Outcome
D. P = P-value; I = Intervention; C = Comparison; O = Outcome