题目内容
（请给出正确答案）
[主观题]
All of the following are mentioned in the passage as reasons for allowing unlabeled uses o
f drugs EXCEPT______.
A．the increased cost to the patient of buying an FDA-approved drug
B．the medical benefits which can accrue to the patient through unlabeled use
C．the time lag between initial discovery of a medical use and FDA approval of that use .
D．the possibility that a medically beneficial use may never be clinically documented
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