单项选择题

The lecture was supposed to start at eight, but it was delayed an hour.()

A.讲座以为在八点开始,但一个小时以后就开场了。
B.讲座被认为在八点钟开始,但被耽误了近一小时。
C.讲座本该在八点钟开始,但迟了一个多小时。
D.讲座应该在八点钟开始,但被耽误了一个小时。