在窗体E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，如图1所示，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，如图2所示。能实现此功能的事件过程是( )。

A．Private 3ub Form—DragDrop(Source As Control，X As Single，Y As Single)
banana．Move Picture1．Left+X，Picture1．Top+Y
End Sub
B．Private Sub banana_DragDrop(Source As Control，X As Single，Y As Single)
Source．Move Picture1．Left+X，Picture 1．Top+Y
End Sub
C．Private Sub Picturei_DragDrop(Source As Control，X As Single，Y As Single)
Source．Move Picture1．Left+X，Picture1．Top+Y
End Sub
D．Private Sub Picture1_DragDrop(Source As Control，X As Single，Y As Single)
banana．Move banana．Left+X，banana．Top +Y
End Sub