【阅读下列短文，从每题所给的（A、B、C和D）四个选项中，选出最佳选项。VitaminSupplements:MoreMayBeTooMuchVitaminsaremeanttoimprovepeople'santi-diseasesystems】

　　阅读下列短文，从每题所给的（A、B、C和D）四个选项中，选出最佳选项。

　　VitaminSupplements:MoreMayBeTooMuch

　　Vitaminsaremeanttoimprovepeople'santi-diseasesystems，andwiththespreadofSARSandbindflu，manyChinesearetakingvitaminsACandEeveryday．

　　ButsomeUSresearcherssaythatvitaminsupplements（补充）cannotcorrectapoordiet，andthatmultivitaminshavenotbeenshowntopreventanydisease．Itisalsoeasyforhighdoses（剂量）ofcertainvitaminsandmineralstoincreasetheriskofdiseaseactually．

　　Expertssaytheyarenolongerconcernedaboutthelackofvitamin．Thosearealmostunheardoftodayevenwiththepopulationeatingfewerfruitsandvegetables．Instead，theconcerniswiththedangersofvitaminexcess（过量）．

　　DrBeniaminCaballeroamemberoftheFoodandNutrtionBoardattheUSNationalAcademyofSciencessaidthatforsomesupplementsincludingvitaminAthedifferencebetweentheadviseddoseandthedosethatcouldleadtodiseaselikeosteoporosis(bonedisease)wasnotlarge．Popularmulti-vitaminsheaddedoftencontainwhatcouldberiskydose．

　　SimilarquestionsarebeingraisedahoutothervitaminsandmineralsparticularlyironandvitaminsEandC．

　　Researcherssaythequestionsinvolvemultivitaminstakenbyhealthypeoplenotparticularvitaminsormineralstakenbygroupswithspecialneeds．SomeelderlypeopleforexamplemaylackB12becausetheylosetheirabilitytoabsorbitfromfoods．PeoplewhospendlittletimeoutdoorsmayrequirevitaminDwhichtheskinmakeswhenitisexposedtosunlight．EvenwhenolderpeopleareinthesunagingskinlosesmuchofitSabilitytocreatethevitamin．

　　“Ifyoueatapoordieteverydayvitaminsaretheleastofyourmanyproblems”saidDrCaballero．“Youcannotreplaceahealthydiet．Peoplearelookingforthemagicbulletwhichdoesn'texist．”

　　(1)

　　Fromthesecondparagraphwecanfindthat________

　　[]A．

　　pare