Although some doctors believe that the drug can have positive effects when taken sporadically, most agree that the

Although some doctors believe that the drug can have positive effects when taken sporadically, most agree that the medicine is effective only if it is administered in a single, concentrated dose.

(A) only if it is administered in a single, concentrated dose

(B) if it was administered only in a single and concentrated dose

(C) if it would only be administered in a concentrated dose, singly

(D) only if it would only be administered in a singly concentrated dose

(E) if it is administered only in a dose concentrated singly


OA A

Source: Princeton Review