All oF thE Following DEsCriBE thE proDuCts or sErviCEs proviDED By suCCEssFul Firms ExCEpt ______
A、oBsolEtE.
B．rEAsonABly priCED、
C．ADEquAtE quAlity.
D．DEsirED By CustomErs.
E．CustomEr sAtisFying.