— Putting on a happy face not only helps us make friends but also makes us feel better.    

— _____.  [      ]

A. I'd love to                  

B. I'm with you on that      

C. It's up to you                

D. It's my pleasure

广告的首要责任由（）承担。

A.传播广告的媒体

B.广告的发起人和指导者

C.政府部门

D.政府机构