quEstion 26 is BAsED on thE Following nEws. At thE EnD oF thE nEws itEm, you will BE givEn 5 sEConDs to AnswEr thE quEstion. now, listEn to thE nEws.
A．to proCEss ruBBish in thE intErnAtionAl spACE stAtion.
B．to CArry out spACE ExpErimEnts.
C．to prEvEnt musClE Atrophy in AstronAuts.
D．to grow CAEnorhABDitis ElEgAns.