25. 某債券期貨契約報價為103.5,請問下列四種債券何者為最便宜可交割債券(Cheapest-to-deliver bond)?(A)Quoted price = 110； conversion factor = 1.0400(B)Quoted price = 160； conversion factor = 1.5200(C)Quoted price = 131； conversion factor = 1.2500(D)Quoted price = 143； conversion factor = 1.3500