Some hobbies are very expensive,but others don't cost anything______

Some hobbies are very expensive,but others don't cost anything______

A.first of all

B.ar all

C.of all kinds

D.in all

请问应选哪个?为什么?请分析详细一些.

应该是B，at all吧

at all

adv.

根本（一般用在否定句，疑问句）

“一些爱好要花费很多资金，而其他的则根本不花钱”