There is little chance that we will succeed in changing the law. ______, it is important that we should have a try.

A．Therefore

B．Otherwise

C．However

D．Thus

关于排桩的施工，按照《建筑基坑支护技术规程》(JGJ120-99)的规定，下列叙述不正确的是( )。

A．桩位偏差在轴向和垂直轴向均不宜超过50mm

B．垂直度偏差不宜大于0.5%

C．钻孔灌注桩桩底沉渣不宜超过200mm

D．均匀配筋排桩的钢筋笼在绑扎、吊装和埋设时，应保证钢筋笼的安放方向与设计方向一致