已知主、左视图，若将主视图改为全剖视图，正确的是（）。<img src="https://static.zxtiku.com/wangke/imgs/topic/3dad875174fb9a2497930864ad1fd117.jpg"/> A. <img src="https://static.zxtiku.com/wangke/imgs/topic/6d41b2fd0cc3f3cca9cef7d8443b800c.jpg"/> B. <img src="https://static.zxtiku.com/wangke/imgs/topic/541b778067ecf89d74472a8f931ed3ce.jpg"/> C. <img src="https://static.zxtiku.com/wangke/imgs/topic/d2597f071b0bc636e57d5d8dd7c4db34.jpg"/> D. <img src="https://static.zxtiku.com/wangke/imgs/topic/d106244b9624a2761f1c90dcafc71187.jpg"/>