下列加粗的字，每对读音都不相同的一组是[ ]

A．殷红/ 期望甚殷　应聘/ 供不应求　折本/ 斗折蛇行

B．税率/ 鲁莽草率　偏裨/ 大有裨益　罚没/ 湮没无闻

C．行善/ 高山景行　颤栗/ 颤颤悠悠　强横/ 强人所难    

D．假期/ 久假不归　拗口/ 脾气执拗　可恶/ 从恶如崩

After a long and tiring flight, Mr. Ritz was frustrated at the news ______ his luggage had been sent to Hong Kong by mistake.

A．that

B．which

C．what

D．because