Which&ensp；can&ensp；be&ensp；used&ensp；to&ensp；encode&ensp；charS&ensp；for&ensp；output？（）

A、 Java.io.OutputStream.

B、 Java.io.OutputStreamWriter.

C、 Java.io.EncodeOutputStream.

D、 Java.io.EncodeWriter.

E、 Java.io.BufferedOutputStream.

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• Given that a static method doIt（） in a class Work represents work to be done， what block of code will succeed in starting a new thread that will do the work？   CODE BLOCK a：   Runnable r = new Runnable（） {   public void run（） {   Work.doIt（）；   }   }；   Thread t = new Thread（r）；   t.start（）；   CODE BLOCK b：   Thread t = new Thread（） {  public void start（） {   Work.doIt（）；  }  }；   t.start（）；   CODE BLOCK c：   Runnable r = new Runnable（） {   public void run（） {   Work.doIt（）；   }   }；   r.start（）；  CODE BLOCK d：   Thread t = new Thread（new Work（））；   t.start（）；   CODE BLOCK e：   Runnable t = new Runnable（） {   public void run（） {   Work.doIt（）；   }   }；   t.run（）；  

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  B、Code block B.

  C、Code block c.

  D、Code block d.

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