Where there is a clause in the charter-party stating that on redelivery the owners are to pay for fuel remaining on board；and no price is mentioned，it is implied that______.
A.they dono have to pay the price
B.they will pay the price as will be required
C.they will pay the price as will be provided by the charterer
D.they must pay a reasonable onei．e．the market price
正确答案是D