why DiD pEoplE still pArk thEir CArs in Front oF his housE EvEn AFtEr mr. smith put up A BoArD with thE worDs "no pArking" on it ______
A．it wAs not A poliCE notiCE.
B．it wAs not A politE notiCE.
C．it wAs not pAintED BluE.