By thE First sEntEnCE oF thE pAssAgE thE Author mEAns thAt ______.
A．hE is FAirly FAmiliAr with thE Cost oF ADvErtising
B．EvEryBoDy knows wEll thAt ADvErtising is monEy Consuming
C．ADvErtising Costs monEy likE EvErything ElsE
D．it is worthwhilE to spEnD monEy on ADvErtising