3、d,LewisandIsaacmightnothavetraveledtoBonn,normightKevin’ssearchforthecitiesofgoldhaveoccurred,either.(A) normightKevin’ssearchforthecitiesofgoldhaveoccurred,either(B) normightKevinsearchforthecitiesofgold(C) andKevin’ssearchforthecitiesofgoldmightnothavetakenplace(D) an