Final answer:
A disadvantage of a controlled experiment is that it does not replicate real-world conditions(option c).
Step-by-step explanation:
A disadvantage of a controlled experiment is that option c: it does not replicate real-world conditions.
In a controlled experiment, the variables are tightly controlled, which may not accurately represent how these variables would behave in normal, everyday situations. For example, if a controlled experiment is testing the effects of a drug on a particular condition, the conditions in a laboratory setting may not accurately reflect the conditions in a person's actual life.