关于一篇阅读理解中的一题CBCisafamousaircompanywhichhasover.CBCisafamousaircompanywhichhasovertwentyplanescarryingpassengersandgoods,flyingalong12fixedlinesallovertheworld.Itsserviceisverygoodbutsomepas

　　关于一篇阅读理解中的一题CBCisafamousaircompanywhichhasover.

　　CBCisafamousaircompanywhichhasovertwentyplanescarryingpassengersandgoods,flyingalong12fixedlinesallovertheworld.Itsserviceisverygoodbutsomepassengersarestillnotsatisfiedwithitandthatiswhyin2003and2004thecompanyreceivedlettersofcomplaintsfromconsumersorpassengerswhopointedoutoveradozenkindsofproblemswhicharedividedingroupsinthefollowingtable.Thoseaboutpassengers’thingscarriedbytheplaneareBaggageproblems.Customerservicereferstoserviceworkwithpassengersarenotsatisfiedwith.Oversalesofseatsareaboutthefactthatmoreseatsaresoldandasaresulttheplaneistoocrowdedtobesafe.Refundproblemsappearwhenpassengersfailtoreceivethemoneypaidbacktothembecauseofwhattheyhavelost.Faresareproblemsaboutthepriceoftickets.

　　ConsumerComplaintsReceivedBytheCBC

　　Category20032004

　　Flightproblems20.0%22.1%

　　Baggage18.3%21.8%

　　Customerservice13.1%11.3%

　　Oversalesofseats10.5%11.8%

　　Refundproblems10.1%8.1%

　　Fares6.4%6.0%

　　Reservation&Ticketing5.8%5.6%

　　Tours3.3%2.3%

　　Smoking3.2%2.9%

　　Advertising1.2%1.1%

　　Credit1.0%0.8%

　　Specialpassengers0.9%0.9%

　　Others6.2%5.3%

　　TotalNumberofComplaints22,98813,278

　　Ifthecategories,except"other"areplacedintheorderofpercentofcomplaintsfrongreatesttoleast,forhowmanyofthecategorieswouldtheplacechangefrom1998to1999?

　　A.3B.4C.6D.7