An intErnAtionAl BonD invEstor hAs gAthErED thE Following inFormAtion on A 10 - yEAr, AnnuAlpAy u. s. CorporAtE BonD:CurrEntly trADing At pAr vAluEAnnuAl Coupon oF 10%EstimAtED priCE iF rAtEs inCrEAsE 50 BAsis points is 96.99%EstimAtED priCE is rAtEs DECrEAsE 50 BAsis points is 103.14% thE BonD’s DurAtion is ClosEst to:
A、

A、6.58.

B．

B、0.62.

C．

C、6.15.