ClAssiFiED ADvErtising is DiFFErEnt From DisplAy ADvErtising BECAusE ______.
A．All ADvErtisEmEnts oF A CErtAin typE ArE groupED togEthEr
B．it is morE DistinguishED
C．it is morE ExpEnsivE
D．nowADAys thE ClAssiFiED ADvErtisEmEnts ArE All oF thE sAmE sizE