题目内容：
根据以下材料，回答题Hairlosscanbedestructiveforthemillionsofmenandwomenwhoexperienceit.Nowscientistsarereportingthatasubstancefromhoneybeehivesmightcontainclues,fordevelopingapotential
newtherapy.
Theyfoundthatthematerial,calledpropolis,encouragedhairgrowthinmice.ThestudyappearsinACSJournalofAgriculturalandFoodChemistry.
KenKobayashiandcolleaguesnotethatpropolisisaresin——likematerialthathoneybeesusetosealsmallgapsintheirhives.Notonlydoesitworkasaphysicalbarrier,butitalsocontainsactivecompoundsthatfightfungalandbacterialinvasions.
Peoplefromancienttimeshadnoticedpropolis'specialpropertiesandusedittotreattumors,inflammationandwounds.Morerecently,researchhasshownthatthesubstanceprotnotesthegrowthofcertaincellsinvolvedinhairgrowththoughnoonehadyettestedwhetherthatinturnwouldresultinnewlocks.Kobayashi'steamwantedtofindout.
Whentheresearcherstestedpropolisonmicethathadbeenshavedorwaxed,themicethatreceivedthetreatmentregrewtheirfurfasterthanthosethatdidn't.Thescientistsalsonoticedthat
afterthetopicalapplication,thenumberofspecialcellsinvolvedintheprocessofgrowinghairincreased.Althoughtheytriedthematerialonmicethatcouldgrowfurratherthanbaldingmice,theresearchersnotethathairlossconditionsoftenresultfromabnormalinflammation.Propoliscontainsanti-inflammatorycompounds,sotheyexpectitcouldhelptreatbaldingconditions.Theyaddthatfurthertestingisneededtoseeifthebeehivematerialaffectshumanhairfollicles.
Theunderlinedsentenceinthefirstparagraphmeans? A．Hairlosscan'tberepaired
B．Haircutcanbeharmful
C．Everyonemustexperiencehairloss
D．Baldnesscanberuinousforthevictims
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答案解析：