Rearrange the following sentence parts to form a meaningful and grammatically correct paragraph:
P. The research team recruited a large group of qualified participants for the study.
Q. At the end of the trial, they analysed the results to determine the drug's effectiveness.
R. The team monitored the health and progress of all the participants for several months.
S. Half the participants received the new drug, while the other half received a placebo.
Show answer & explanation
Correct answer: B
Explanation
The correct order of sentences creates a logical narrative of a clinical trial:
P begins the process by recruiting participants.
S explains the setup of the experiment (drug vs. placebo).
R describes the monitoring process during the study.
Q concludes the study with analysis of the results.