题目内容：
GenerationsofAmericanshavebeenbroughtuptobelievethatagoodbreakfastisonelife’sessentials.Eatingbreakfastatthestartoftheday,wehaveallbeentold,andtoldagain,isasnecessaryasputtinggasolineinthefamilycarbeforestartingatrip.Butformanypeoplethethoughtoffoodfirstthinginthemorningisbynomeansapleasure.Sodespitealltheefforts,theystilltakenobreakfast.Between1977and1983,thelatestyearforwhichfiguresareavailable,thenumberofpeoplewhodidn’thavebreakfast,increasedby33percent.
Forthosewhofeelpainofguiltaboutnoteatingbreakfast,however,thereissomegoodnews.Severalstudiesinthelastfewyearsindicatethat,foradultsespecially,theremaybenothingwrongwithomittingbreakfast.“Goingwithoutbreakfastdoesnotaffectperformance,”saidArroldE.Bender,formerprofessorofthenutritionatQueenElizabethCollegeinLondon,“nordoesgivingpeoplebreakfastimproveperformance.”
Scientificevidencelinkingbreakfasttobetterhealthorbetterperformanceissurprisinglyinadequate,andmostoftherecentworkinvolveschildren,notadults,“Theliterature”,saysoneresearcher,Dr.ErrestoattheUniversityofTexas,“ispoor”.
Thelatestyearforwhichfigurescouldbeobtainedis_______.
A.theyeartheauthorwrotethearticle
B.1977
C.anyyearbetween1997and1983
D.1983
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答案解析：