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Sagot :
Final answer:
Randomized controlled trials are the gold standard for research. Ethical concerns and difficulty in random assignment can prevent conducting certain experiments.
Explanation:
Randomized controlled trials (RCTs) are considered the gold standard for establishing causal relationships in research.
However, in the case of aspirin and prostate cancer risk, conducting a randomized experiment may not be possible due to ethical concerns surrounding denying participants the known benefits of aspirin for cardiovascular issues.
Additionally, the difficulty in randomly assigning participants to take aspirin or not can also pose a challenge in establishing a causal relationship.
Learn more about Randomized Controlled Trials here:
https://brainly.com/question/31647034
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