{$mEDiAurl}
why DoEs thE proFEssor sAy this:
A．to illustrAtE thE unrEAsonABlE DEmAnDs oF thE typiCAl ConsumEr
B．to CompArE ConsumErs in northAmEriCA with thosE in othEr plACEs
C．to givE ExAmplEs oF Common AgriCulturAl proDuCts in northAmEriCA
D．to ExplAin why AgriCulturAl mArkEting tEChnology is nECEssAry