lsat-03-12-B

Medical specialists report that patients with back muscle injuries who receive a combination of drugs and physical therapy do only as well as those who receive physical therapy alone. Yet the specialists state that drug are a necessary part of the treatment of all patients who receive them for back muscle injuries.

Which one of the following, if ture, most helps to reconcile the medical specialists' two claims?

(A) Medical specialists treat all patients who have serious back muscle injuries with either physical therapy alone or a combination of drugs and physical therapy.

(B) Medical specialists who prescirbe treatments make accurate judgement about who needs both drung and physical therapy and who needs physical therapy alone.

(C) Some back muscle unjuries have been completely healed by a combination of drugs and physical therapy.

(D) some back muscle injuries that have been aggravated by improper attempts at physical therapy, such as home message, have been successfully treated with drugs.

(E) Patients with injuries to other muscles show more improvement when treated with both drugs and physical therapy than when treated with physical therapy alone.

---- why it's (B)? If so, then why drugs are necessary  part of treatment?