_____nice picture it is!A.What B.How C.What a D.How a

_____nice picture it is!
A.What B.How C.What a D.How a

选C.
没有How a/an这样的用法.
how+adj./adv.+(其它)
what a/an+adj.+n(可数).+(其它)
what +n.+(其它)
what后的名词若为不可数,不用a/an