在窗体上先后画2个图片框，名称分别为Picture1和banana,banana中添加了香蕉图片（见图1），且将banana.DragMode属性设置为1。要求程序运行时，可以用鼠标把banana拖拽到Picture1中（见图2）。能实现此功能的事件过程是（）

A．Priate Sub Form_DragDrop（Source As Control,X As Single,Y As Single banana.Move Picture1.Left+X,Picture1.Top+Y）

E．nd Sub

B．Private Sub banana _DragDrop（Source As Control,X As Single,Y As Single ）

Source.Move Picture1.Left+X.Picture1.Top+Y

E．nd Sub

C．Private Sub Picture1_DragDrop（Source As Control,X As Single,Y As Single ）

Source.Move Picture1.Left+X.Picture1.Top+Y

E．nd Sub

D．Private Sub Picture1_DragDrop（Source As Control,X As Single,Y As Single ）

banana.Move banana.Left+X, banana.Top+Y

E．nd Sub