Help others whenever you can _____ you will make the world a nicer place to live in. [ ]

A. and

B. or

C. unless

D. but

个人担任企业董事职务所取得的董事费收入，按( )项目征收个人所得税。

A．工资、薪金所得
B．劳务报酬所得
C．个体工商户的生产经营所得
D．对企事业单位的承包经营、承租经营所得