单项选择题
What is the result？（）
A.2 B.3 C.1，2 D.2，3 E.1，2，3
A.42 B.420 C.462 D.42042
A.Line 35 will not compile. B.Line 36 will not compile. C.Line 37 will not compile. D.Line 38 will not compile.
