Which of the Following Statements Is True About Premarketing and Postmarketing

Multiple Choice

Which of the following statements is true about premarketing and postmarketing drug studies?

A) Both premarketing and post-marketing studies are nearly always randomized trials.
B) Premarketing studies are typically randomized trials and post-marketing studies can be randomized trials or observational studies.
C) Premarketing studies are typically observational studies and post-marketing studies can be randomized trials or observational studies.
D) Both premarketing and post-marketing studies are nearly always observational studies.