单选题单层砌体结构房屋墙体采用刚性方案静力计算时，正确的计算简图是（　　）。<br/> ?A．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/18930819_0.jpg"><br/> ?B．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/18930819_0_1.jpg"><br/> ?C．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/18930819_0_2.jpg"><br/> ?D．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251122/18930819_0_3.jpg">