根据以下材料,回答 Hairlosscanbedestructiveforthemillionsofmenandwomenwhoexperienceit.Nowscientistsarereportingthatasubstancefromhoneybeehivesmightcontaincluesfordevelopingapotentialnewtherapy.Theyfoundthatthematerial,calledpropolis,encouragedhairgrowthinmice.ThestudyappearsinACS′JournalofAgriculturalandFoodChemistry.KenKobayashiandcolleaguesnotethatpropolisisaresin-likematerialthathoneybeesusetosealsmallgapsintheirhives.Notonlydoesitworkasaphysicalbarrier,butitalsocontainsactivecompoundsthatfightfungalandbacterialinvasions.Peoplefromancienttimeshadnoticedpropolis′specialpropertiesandusedittotreattumors,inflammationandwounds.Morerecently,researchhasshownthatthesubstancepromotesthegrowthofcertaincellsinvolvedinhairgrowththoughnoonehadyettestedwhetherthatinturnwouldresultinnewlocks.Kobayashi′steamwantedtofindout. Whentheresearcherstestedpropolisonmicethathadbeenshavedorwaxed,themicethatreceivedthetreatmentregrewtheirfurfasterthanthosethatdidn′t.Thescientistsalsonoticedthatafterthetopicalapplication,thenumberofspecialcellsinvolvedintheprocessofgrowinghairincreased.Althoughtheytriedthematerialonmicethatcouldgrowfurratherthanbaldingmice,theresearchersnotethathairlossconditionsoftenresultfromabnormalinflammation.Propoliscontainsanti-inflammatorycompounds,sotheyexpertitcouldhelptreatbaldingconditions. Theyaddthatfurthertestingisneededtoseeifthebeehivematerialaffectshumanhairfollicles. Theunderlinesentenceinthefirstparagraphmeans___________.
A.hair loss can't be repaired B.hair cut can be harmful C.everyone must experience hair loss D.baldness can be ruinous for the victims正确答案D