患者，女，45岁，<img src="/Image1/03/037139543f09650cbe86a66b507e6957.jpg" />缺失，检查可见：缺牙区牙槽嵴丰满，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />间食物嵌塞，余牙正常。前牙区口，底浅，舌侧倒凹大。拟铸造支架义齿修复。最佳的设计方案是（）<br>A:<img src="/Image1/5f/5f110dcb1b597d2704c4a4afe4b36d7c.jpg" />RPI，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />隙卡，舌杆连接<br>B:<img src="/Image1/5f/5f110dcb1b597d2704c4a4afe4b36d7c.jpg" />三臂卡环，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />隙卡，舌杆连接<br>C:<img src="/Image1/5f/5f110dcb1b597d2704c4a4afe4b36d7c.jpg" />RPI，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />联合卡环，舌板连接<br>D:<img src="/Image1/5f/5f110dcb1b597d2704c4a4afe4b36d7c.jpg" />RPI，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />隙卡，舌板连接<br>E:<img src="/Image1/5f/5f110dcb1b597d2704c4a4afe4b36d7c.jpg" />三臂卡环，<img src="/Image1/20/200a32fdf61f0faabb02c64731332644.jpg" />联合卡环，舌板连接