一道中过的寂静题求助

Hayley_777

Palm oil plantations in the Republic of Yaveria have produced more palm oil this year thanthey can sell. Some plantation managers plan to process their surplus oil into fuel for dieselengines used on their plantations. However, this is unlikely to be a cost-effective use for thesurplus, since processing palm oil into a gallon of diesel fuel costs more than the averageretail price for a gallon of ordinary diesel fuel in Yaveria
Which of the following, if true, provides the strongest defense of the plantation managers' planagainst the criticism?
(A)  The average annual fuel cost in Yaveria of running a diesel engine is far lower than thecorresponding cost for a gasoline engine.
(B)  Due to declining international demand for palm oil, the price that unprocessed palm oil canbring on the export market is expected to fall drastically over the next few years.
(C)  Processed palm oil can be mixed with ordinary diesel fuel for use in diesel engines.
(D) Most plantations are in remote areas where the coat of bringing in supplie s is much higher than in the rest of the country.
(E) On most plantations, diesel engines are used not only in trucks but also in generators thatsupply electricity to the plantations.
                                
答案是D，（lz第一遍做选了E，看错了选项，以为说的是palm oil做成diesel fuel后可以给Y地的plantation供电用，不卖出去也能产生效益。。。）

但D说的是什么意思呢？求nn帮助！

1998JIN

D的意思是，虽然单看零售价是小于成本，看似不划算，实际情况是如果要买还得付很多运费，这样以来可能还是自己制作比较划算

抖胖小肉

D是coat吗？不是什么cost之类的吗？