下列示意图中,表示土坝棱体排水常用断面型式的是()
A <img src="https://www.beizhujiaoyu.com/uploads/202208/158510802517201.png" alt="" /> B <img src="https://www.beizhujiaoyu.com/uploads/202208/158510804376201.png" alt="" /> C <img src="https://www.beizhujiaoyu.com/uploads/202208/15851080543911.png" alt="" /> D <img src="https://www.beizhujiaoyu.com/uploads/202208/158510806545041.png" alt="" />