Tony _____ go to the opera on Saturday because he's going to have a meeting. [ ]

A. can't

B. might

C. mustn't

D. should

某瓜农种的西瓜，由于管理不善，一些刚开放的花被害虫吃掉了花柱甚至子房的一部分，这种花将来的发育情况可能是(    )

A．正常发育的西瓜

B．发育为无籽西瓜

C．发育为缺损西瓜

D．凋落、不能发育