请在下列程序的横线处填入正确的语句。 import java.awt.*; import java.awt,event.*; public class ex16 { Frame f; TextArea ta; Button btn; public static void main(String[] args) { ex16 e = new ex16();e.m(); } public void m() {f = new Frame("ex16");ta = new TextArea();btn = new Button("ok"); btn.addActionListener(new MyAction());f.add(ta, "Center");f.add(btn, "South");f.setSize(100, 100);f.setVisible (true); } class MyAction implements ActionListener {______{ System. out.println (ta. getText ());} } }

A．static void actionPcrformcd(AcfionEvent

B．public void action(ActionEwent

C．public actionPerformed(ActionEvent

D．public void actionPerformed(ActionEvent