Which of the following statements about the implications of tests for the efficient market hypothesis (EMH) is least accurate（）

A. By purchasing an index fund, an investor can match the market return and minimize costs.

B. Other than corporate insiders and market specialists, most traders have monopolistic access to information, which rejects the p-form EMH.

C. The best way to measure the performance of investments professionals is against a randomly selected buy-hold strategy of stocks (assuming the same risk level).

医师在分析病情时下列哪一项是错误的（）

A.腰5神经根受压常表现有伸肌力减弱

B.腰5骶1椎间盘突出通常使骶1神经根受压

C.腰5骶1椎间盘突出，感觉异常区在外踝部和足外侧

D.踝反射异常表示腰5神经根受压

E.胫前肌肌力减弱常见于腰3～4椎间盘突出