题目内容：
Why was Schneider’s clinic visited by the police?
A．Because the doctor was selling opioid painkillers to the patients． B．Because the clinic was the only one in this area．
C．Because the doctor abused his patients．
D．Because the police wanted to use the clinic as an exam place．
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：