题目内容：

[单选题]（ 34 ）在下列程序的空白处，应填入的正确选项是

Import java.io.*;

Pulilc class ObjectStreamTest{

Publilc static void main(string args[]) throws IOException{

ObjectOutputStream s= new ObjectOutputStream(new FileOutputStream( “ serial.bin ” ));

Java .util.Date d= new Java.util.Date();

Oos___________ (d);

ObjectInputStream is=

new ObjectInputStream(new FileOutputStream( “ serial.bin ” ));

try{

java.util.date restoredDate =(Java.util.Date) ois.readObject();

System.out.println( “ read object back from serial.bin file: ”

+ restoredDate);

}

C．atch (ClassNotFoundException cnf) {

System.out.println ( “ class not found ” );

}

｝

A． ） WriterObject

B． ） Writer

C． ）BufferedWriter

D． ） WriterObject