Experimental research is used where there is

ATime priority in a causal relationship

BConsistency in a causal relationship

CA strong magnitude of association between the variables

DAll of the above ✓ Correct

Correct answer: (D) All of the above

Explanation

Experimental research suits cases showing time priority, consistency and strong association together.

Time priority means the cause precedes the effect.

Consistency means the relationship recurs across trials.

A strong magnitude of association links the variables tightly.

Naming only one criterion would leave the causal case incomplete.

These are the classic conditions for inferring causation.

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