My sister met him at the Grand Theatre yesterdays afternoon, so he ________ your lecture.[ ]

A. couldn't have attended

B. needn't have attended

C. mustn't have attended

D. shouldn't have attended

投资利润率是广泛采用的评价投资中心业绩的指标，它的优点不包括 ( )。

A．避免本位主义

B．能反映投资中心的综合盈利能力

C．具有横向可比性

D．可以正确引导投资中心的经营管理行为，使其行为长期化