The Food and Drug Administration $($FDA$)$ is investigating reports that Caplets Pharmaceutical Corporation is putting po in Doze, a new pain$-$relief medication. The FDA's demands for particular documents from Caplets

A must be specific, but there is no limit on its burdensomeness

B must not be unduly burdensome, but it need not be specific

C must be specific and not unduly burdensome

D need not be specific and there is no limit on its burdensomeness