下列图示的操作模式中，____属于合适的暗场像模式（图中红色虚线是中间镜物平面位置）。<br/> A、<img src="https://static.zxtiku.com/wangke/imgs/topic/e1d972a765aafb6a7a767204aa115b65.jpg"/><br/> B、<img src="https://static.zxtiku.com/wangke/imgs/topic/8ab3c17a28f289cbcaf9834f99cde212.jpg"/><br/> C、<img src="https://static.zxtiku.com/wangke/imgs/topic/7439c2b180511b92acafbb6962ebff82.jpg"/><br/> D、<img src="https://static.zxtiku.com/wangke/imgs/topic/492b40dd086aaf812f777748d570c4a1.jpg"/>