单项选择题

为使下列代码正常运行,应该在下面线处填入的选项是______。
ObjectlnputStream In=
new______(new FileInputStream("employee. doc"));
Employee [] newstaff=(Employee[]) in. readobject ();
In.close();

A.Reader
B.InputStream
C.Objectlnput
D.ObjectlnputStream