165) ANSWER

B) 1-4 weeks

RATIONALE

Sertraline is an antidepressant of the SSRI type. These agents work within 1-4 weeks. Option 1 is an insufficient amount of time, while options 3 and 4 are excessive, as well as similar. Specific knowledge of the time frame in which SSRIs exert an effect is needed to answer this question. Use medication knowledge and the process of elimination to make a selection.