An analyst does research about a forward rate agreement (FRA). An investor who takes a long poison in a forward rate agreement (FRA) on a 60-day Euribor that expires in 90 days is most likely to:（）

A. monitor the underlying rates complied in Frankfurt.

B. be impacted by underlying rates in effect two months from now.

C. benefit if the underlying rates decrease.

在确定桩顶标高时，应考虑桩顶嵌入承台内长度和主筋伸入承台的锚固长度，特别是在桩主要承受水平力时，下列( )项组合是正确的。

A．桩顶嵌入长度不小于60mm，主筋锚固长度不小于30倍钢筋直径

B．对于大直径桩桩顶嵌入长度不小于100mm，主筋锚固长度不小于35倍钢筋直径

C．桩顶嵌入长度不小于1/2桩径，主要锚固长度不小于50倍钢筋直径

D．桩顶嵌入长度不小于2倍桩径，主筋锚固长度不小于45倍钢筋直径