【单选题】
现有如下五个声明:<br /> Linel: int a_really_really_really_long_variable_name=5<br /> Line2: int _hi=6;<br /> Line3: int big=Integer. getlnteger("7”);<br /> Line4:int $dollars=8;<br /> line5: int %opercent=9;<br /> 哪行无法通过编译?()
A、Line1
B、Line3
C、Line4
D、Line5