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 drugs are a necessary part of the treatment of all patients who receive them for back muscle injuries.
Which one of the following, if true, 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 prescribe these treatments make accurate judgments about who needs both drugs and physical therapy and who needs physical therapy alone.
C. some back muscle injuries 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 have been successfully treated with drugs.