【所给答案为什么是A,而不是B呢?Theunderlinedword“develop”inthepassageprobablymeans“______”inChinese.A.出现B.发展C.导致D.影响全文如下：Sittinginfrontofthetelevisionmayberelaxing,butspendin】

　　所给答案为什么是A,而不是B呢?Theunderlinedword“develop”inthepassageprobablymeans“______”inChinese.

　　A.出现B.发展C.导致D.影响

　　全文如下：Sittinginfrontofthetelevisionmayberelaxing,butspendingtoomuchtimeinfrontofitmaytakeyearsoffyourlife.Watchinglesstelevisionmayhelpyoulivealongerlife.

　　Australianresearcherscollectedinformationfrommorethan11,000peopleovertheageof25.ThestudyfoundthatifpeoplewatchedanaverageofsixhoursofTVaday,theylivedabout4.8yearslessthanthosewhodidn’twatchanytelevision.Also,peopleovertheageof25lose22minutesoflifeforeachhourofTVtheywatch.

　　Mostpeopleknowthatsittinginfrontofthetelevisionisn’thealthy.ThemoreTVyouwatch,thelessphysicallyactiveyouare.Andthelessexerciseyouget,themorechancesyouhavetodevelopdiseasesandheartproblems.

　　ThestudycameoutintheBritishJournalofSportsMedicine.LennertVeermanisthemainauthorofthestudy.HethinksthatthehabitofsittingandwatchingTVlongperiodsoftimecanlowerlifeexpectancy.ButVeermansayswatchingtoomuchTVwilllowerlifeexpectancyevenwhenpeoplehaveagooddiet.

　　VeermansaysitmightbeusefulfordoctorstostartaskingtheirpatientsabouthowmuchtimetheyspendinfrontoftheTV.Thismaybeabetterwaytotreatpatientsthanjustaskingthemtogetmoreexerciseorhaveahealthydiet.

　　VeermanthinkspeoplewhocareabouttheirhealthcansimplyturnofftheTVandgetoffthecouchtogetsomeexercise.“Exerciseisgood,”hesays.“Evenlightphysicalactivityimproveshealth.”