-Who wrote the nickname on my new book -I wrote it,( )

问题描述:

-Who wrote the nickname on my new book -I wrote it,( )
A.What's that B.What if C.What for D.So what 请从句子成分,语法结构,时态等详细的分析.请勿误导.

D so what 是“那又怎样”的意思
没什么语法可言,只是情景对话
-谁在我的新本子上写我的花名(nickname是绰号的意思)?
-我写的.那又怎样?