当采用冷拉方法调直时，HPB235. HPB300光圆钢筋的冷拉率不宜大于4% ；HRB335.HRB400.HRB500.HR

当采用冷拉方法调直时，HPB235. HPB300光圆钢筋的冷拉率不宜大于4% ；HRB335.HRB400.HRB500.HRBF335.HRBF400.HRBF500及RRB400带肋钢筋的冷拉率不宜大于（）。

A.4%

B.3%

C.1%

D.5%

正确答案是C