Which Statement Most Accurately Describes a Randomized Controlled Study Design

Which statement most accurately describes a randomized controlled study design?

A) The researcher examines the individual histories of a group of people manifesting a particular disease to find out what common factors they share and what differences can be discerned.
B) Questions and interventions that evolve through partnerships between researchers and participants are best dealt with through participatory action research.
C) This is the best design for answering questions about the effectiveness or harms of certain interventions.
D) Questions exploring perceptions,feelings,and experiences are best answered with this design.

Correct Answer:

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