单项选择题
按照图画出所示图形，求剖面线区域的面积（）
A.11685.0481 B.11685.0841 C.11685.0814 D.11685.0418
A.43.4563 B.43.4635 C.43.4653 D.43.4536
A.3978.7538 B.3978.7583 C.3978.7358 D.3978.7385
