wE CAn inFEr From pArAgrAph 5 thAt
A．BusinEssmEn ArE As knowlEDgEABlE As sCiEntists BECAusE thEy know thE psyChology oF pEoplE's spEnDing hABits.
B．thE ADvErtising AnD sAlEs mEthoDs DEvElopED By BusinEssmEn inFluEnCE thE psyChology oF spEnDing hABits.
C．BusinEssmEn tAkE pEoplE's vArious nEEDs AnD BAsiC vAluEs into ConsiDErAtion, BECAusE thEy ArE ConsiDErAtE.
D．BusinEssmEn CAn EArn morE monEy By tAking ADvAntAgE oF thE psyChology oF pEoplE's spEnD ing hABits.