thE phrAsE "FunCtion in thE DissErviCE oF onE AnothEr"(linE 7. pArA. 1) most proBABly mEAns"______".
A．BEtrAy EACh othEr
B．hArm onE AnothEr
C．hElp to CollABorAtE with EACh othEr
D．BEnEFit onE AnothEr