问题

They wereatthechild, for hewas so addicted to the Internet that he stayed up till 12o’clock every night.
A:but why not
B:disappointingdisappointing
C:disappointeddisappointing
D:disappointingdisappointed
B:disappointingdisappointing
C:disappointeddisappointing
D:disappointingdisappointed
正确答案是: