Which of the following statements is TRUE?

Question

Quizplus · Accepted Answer

Option D is correct as cross-sectional studies typically involve collecting data from individuals at one point in time. Option A is incorrect as control variables cannot completely remove bias in cross-sectional studies, but they can help minimize it. Option B is incorrect as attrition, or dropouts, in randomized trials is not rare and can considerably affect the study results. Option C is incorrect as randomized trials are typically expensive due to the need for rigorous study design, participant recruitment, and follow-up.

Which of the Following Statements Is TRUE