Question

Thirty patients with acne volunteer to be treated with either a medicinal lotion

or a normal moisturizing cream. This type of experimental design is called
a(n)

A. in vitro observation
B. clinical trial
c. geographical cohort study
D. general population survey

Answer 1

Thirty patients with acne volunteer to be treated with either a medicinal lotion

or a normal moisturizing cream. This type of experimental design is called

a clinical trial.-B.