资料：Placingtherighttypeofworkersincloseproximitytoeachothercangenerateuptoa15percentincreaseinorganizationalperformance，accordingtothestudyfromCornerstoneOnDemand，aproviderofcloud-basedlearningandtalent-managementsoftware，andresearchersatHarvardBusinessSchoolinMassachusetts.Forbusinesseswith2，000employees,thistranslatesintoanadditional$1millioninprofiteachyear，thestudysaid. Forthestudy，researchersexamineddatafromatwo-yearperiodofmorethan2，000employeesworkingatalargetechnologycompanywithlocationsintheU.S.andEurope.Thestudy’sauthorsseparatedworkersintothreedifferentcategoriesbasedontheworktheyproduced： Productive：Theseemployeesareveryproductive，butdon’talwaysproducequalitywork. Quality：Theseworkersproduceworkofsuperiorquality，butaren’talwaysproductive. Generalists：Theseemployeesareaverageintermsofbothproductivityandquality. Theresearchersdefinedproductivitybyhowlongittakesanemployeetofinishatask，andeffectivenessbyhowoftenemployeesneedtoaskaco-workerforhelpcompletingatask. What’sthemainideaaboutthefirstparagraph？
A.Cornerstone On Demand is a provider of cloud-based learning and talent-management software B.Placing the right type of workers together will generate 15% increase in performance C.Smarter seating can affect company’s performance D.A study about how a firm get additional profit正确答案B
