单项选择题
按照图画出所示图形，求剖面线区域的面积。（）
A.2277.7857 B.2277.8757 C.2277.8775 D.2277.8577
A.1912.6755 B.1912.6575 C.1912.6557 D.1912.7655
A.609.2406 B.609.2064 C.609.2046 D.609.2604
