Everycaratacertaindealershipiseitheraconvertible,asedan,orboth.Ifone-fifthoftheconvertiblesarealsosedansandone-thirdofthesedansarealsoconvertibles,whichofthefollowingcouldbethetotalnumberofcarsatthedealership?
(A)28(B)29(C)30(D)31(E)32
求地道翻译和完整解题思路及过程