The most recent settlement bond futures price is 103.5. Which of the following four bonds is cheapest to deliver? 

A、Quoted bond price = 110; conversion factor = 1.0400.
B、Quoted bond price = 160; conversion factor = 1.5200.
C、Quoted bond price = 131; conversion factor = 1.2500.
D、Quoted bond price = 143; conversion factor = 1.3500.