The usan stem for cholesterol-lowering agents is: a. –olol. b. –afil. c. –statin. d. –vir.

C.–statin.

Explanation:

USAN is a US product naming system. These systems are intended to provide simple, unique and proprietary names that provide consumers with a logical and informative classification of the name of household products circulating in the country. For cholesterol lowering products USAN uses the designation "–statin."

explanation:

daily refers to frequency, like weekly or monthly. take this medicine twice daily, once in the morning and again at bedtime. on a daily basis there refers to everyday life, to one's normal or usual behavior, activity, routine, or schedule, to the quotidien.

your answer will be c. sorry if im wrong: )