双击一个名为btnCom的按钮，自动生成的鼠标点击事件处理方法为：
选项：

A:private void btnCom_Click(object sender, EventArgs e){ }
B:public void btnCom_Click(object sender, EventArgs e){ }
C:private void btnCom(object sender, EventArgs e){ }
D:public void btnCom(object sender, EventArgs e){ }