求问一道GMAT语法~MorethanfiftyyearsaftertheSecondWorldWar,anumberofAfricanAmericansoldierswereawarded―someofthemposthumously―withtheCongressionalMedalofHonor,whichwasthenation’shighestmilitaryaward,andwhichwas

　　求问一道GMAT语法~

　　MorethanfiftyyearsaftertheSecondWorldWar,anumberofAfricanAmericansoldierswereawarded―someofthemposthumously―withtheCongressionalMedalofHonor,whichwasthenation’shighestmilitaryaward,andwhichwaslongoverdueinrecognitionoftheiroutstandingbravery.

　　AwiththeCongressionalMedalofHonor,whichwasthenation’shighestmilitaryaward,andwhichwaslongoverduein

　　BwiththeCongressionalMedalofHonor,thenation’shighestmilitaryawardforlong-overdue

　　CtheCongressionalMedalofHonor,whichwasthenation’shighestmilitaryaward,long-overduein

　　DtheCongressionalMedalofHonor,thenation’shighestmilitaryawardforlong-overdue

　　EtheCongressionalMedalofHonor,thenation’shighestmilitaryaward,inlong-overdue

　　前边我懂,我想问后边long-overdue那部分应该是怎样的?forin什么的有什么区别?