单项选择题

A.轴力-6200N,剪力3150N,弯矩6300Nm
B.轴力-2600N,剪力3150N,弯矩3600Nm
C.轴力-6200N,剪力1350N,弯矩3600Nm
D.轴力-2600N,剪力1350N,弯矩6300Nm