单项选择题

A.b = nf.parse（ input ）；B.b = nf.format（ input ）；C.b = ……

Given：
11.double input = 314159.26；
12.NumberFormat nf = NumberFormat.getInstance（Locale.ITALIAN）；
13.String b；
14.//insert code here
Which code， inserted at line 14， sets the value of b to 314.159，26？（）

A.b = nf.parse（ input ）；
B.b = nf.format（ input ）；
C.b = nf.equals（ input ）；
D.b = nf.parseObject（ input ）；

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A.ad
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B.The value of s is Dec 14， 2000.
C.An exception is thrown at runtime.
D.Compilation fails because of an error in line 13.