单选题如图所示，结构外侧温度未变，里侧升高了10℃。已知:矩形截面的高度为h，线膨胀系数为α，则C的水平向位移为（　　）。<br/> <br/> <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/8325538_0.jpg"><br/> <img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20251103/8325538_0_1.png">