When a patient failed to respond to prescribed medication, the doctor hypothesized ... ...

When a patient failed to respond to prescribed medication, the doctor hypothesized that the dosage was insufficient. The doctor first advised doubling the dosage, but the patient’s symptoms remained. It was then learned that the patient regularly drank an herbal beverage that often inhibits the medication’s effect. The doctor then advised the patient to resume the initial dosage and stop drinking the beverage. The patient complied, but still showed no change. Finally, the doctor advised the patient to double the dosage and not drink the beverage. The patient’s symptoms disappeared. Hence, the doctor’s initial hypothesis was correct. Which one of the following most accurately describes the manner in which the doctor’s second set of recommendations and the results of its application support the doctor’s initial hypothesis?
(A) They establish that the doctor’s concerns about the healthfulness of the beverage were well founded.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Oct 2012 LSAT (PT67): Logical Reasoning A