Artmuseumsdonotusuallythinkoftheircollectionsascapitalorconsidertheinterestincomethatwouldbegeneratedifaportionofthecapitalwouldhavebeeninvestedinanotherform.（）
(A)begeneratedifaportionofthecapitalwouldhavebeen
(B)havebeengeneratedifaportionofthecapitalwouldhavebeen
(C)begeneratedifaportionofthecapitalwere
(D)begeneratedifaportionofthecapitalwas
(E)begeneratedifaportionofthecapitalhadbeen