某公司本年主营业务收入为870万元，利润总额为300万元，主营业务成本为400万元，为当年的科技支出合计为85万元，则本年技术投入比率是（）。

A.21.25%

B.9.77%

C.28.33%

D.11.5%

——Will you please help me with my English——( )．

A．Excuse me，I'm afraid not

B．It's very nice of you

C．I'm sorry to hear that

D．Certainly，I'll be glad to