单项选择题

为了支持压栈线程与弹栈线程之间的交互与同步,在下画线处依次填入的语句是 public class IntStack {  private int idx=0;  private int[]data=new int[8];  public ______ void push(int i) {   data[idx]=i;   idx++;   ______  }  … }

A.synchronized() notify()
B.synchronized() this.wait()
C.synchronized() this.notify()
D.synchronized() sleep()