SAT English Practice Question

The main purpose of the study was to examine the effects of a new drug on the body’s immune system. Researchers recruited volunteers for the study, who were randomly assigned to either a treatment group or a control group. The volunteers in the treatment group received the new drug, while the volunteers in the control group received a placebo. The researchers then monitored the volunteers for a period of six months, measuring various immune system parameters. At the end of the study, the researchers found that the volunteers in the treatment group had a significantly lower incidence of infection than the volunteers in the control group.

1. A.The volunteers in the treatment group received the new drug, while the volunteers in the control group received a placebo, and then they monitored the volunteers for a period of six months, measuring various immune system parameters.
2. B.The volunteers in the treatment group received the new drug, while the volunteers in the control group received a placebo; the researchers then monitored the volunteers for a period of six months, measuring various immune system parameters.
3. C.The volunteers in the treatment group received the new drug, while the volunteers in the control group received a placebo, the researchers then monitored the volunteers for a period of six months, measuring various immune system parameters.
4. D.The volunteers in the treatment group received the new drug, while the volunteers in the control group received a placebo; the researchers then monitored the volunteers for a period of six months, measuring various immune system parameters.