Hastings’ contracture is a disorder of the connective tissue in one or both hands, most commonly causing loss of mobility. A survey of thousands of medical-insurance claims found that over 30 percent of people who had one hand operated on for Hastings’ contracture underwent surgery a second time for this disorder within three years. Clearly, therefore, a single surgical treatment of Hastings’ contracture is often ineffective at providing long-term correction of the disorder.
Which of the following, if true, most seriously weakens the argument

A．The medical-insurance claims did not specify whether the surgery was on the patient’s right or left hand.

B．The surgical techniques used to treat Hastings’ contracture are identical to those used successfully to treat certain work-related injuries to the hand.

C．A separate survey found that 90 percent of patients operated on for Hastings’ contracture report increased hand mobility within one month after the surgery.

D．All of the patients in the survey were required by their insurance companies to seek a second opinion from a qualified surgeon before undergoing the operation.

E．(E) Many people who have Hastings’ contracture choose to tolerate its effects rather than undergo the risks of surgery.

上海自贸区的建设将涉及十几项国家法律法规的修改，全国人大常委会将审议并决定在试验区调整涉及部分法律规定的行政审批和事项。这说明全国人大常委会（）。

①是国家权力机关

②坚持依法行政

③具有最高决定权

④行使国家立法权

A.①②

B.②③

C.①④

D.③④