Passage2 Thefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinmakingfoodmorefittoeat,ithas,atthesametime,mademanyfoodsunfitto eat.someresearchhasshownthatperhapseightypercentofallhumanillnessarerelatedtodietandfortypercentofcancerisrelatedtothedietaswell,especiallycancerofthecolon.Differentculturesaremorepronetocontractcertainillnessbecauseofthefoodthatischaracteristicinthesecultures. Thatfoodrelatedtoillnessisnotanewdiscovery.In1945,governmentresearchersrealizedthatnitratesandnitrites,commonlyusedtopreservecolorinmeats,andotherfoodadditives,causedcancer.Yet,thesecarcinogenicadditivesremainin ourfood,anditbecomesmoredifficultallthetimetoknowwhichthingsonthepackaginglabelsofprocessedfoodarehelpfulorharmful. Theadditiveswhichweeatarenotallsodirect.Farmersoftengivepenicillintobeefandpoultry,andbecauseofthis,penicillinhasbeenfoundinthemilkoftreatedcow.Sometimessimilardrugsareadministeredtoanimalsnotformedicinalpurposes,butforfinancialreasons.Thefarmersaresimplytryingtofattentheanimalsinordertoobtainahigherpriceonthemarket.Althoughthe FoodandDrugAdministration(FD A)hastriedrepeatedlytocontroltheseprocedures,thepracticescontinue. Whatisthemaintopicofthepassage?
A.food and our health B.food and additives C.food and cancer D.food and culture正确答案A
