Question

note: human subjects were divided into three groups: group 1 received drug l after ceasing administration of drug e. group 2 received a placebo after ceasing administration of drug e, and group 3 did not cease administration of drug e. symptom levels were rated at baseline (bl), and at 1 and 4 weeks. for each reported symptom, ratings from baseline to week 4 for subjects in group 2: a. increased only. b. decreased only. c. increased and then decreased. d. stayed the same.

Explanation:

Step1: Locate Group 2 data

Find the dashed - line representing Group 2 in each graph.

Step2: Analyze trend from BL to Week 4

Observe the ratings for each symptom from baseline (BL) to Week 4 for Group 2. In all the graphs, for Group 2 (dashed - line), the ratings first increase from baseline to Week 1 and then decrease from Week 1 to Week 4.

Answer:

C. increased and then decreased.