{{B}}quEstions 19 to 22 ArE BAsED on thE ConvErsAtion you hAvE just hEArD、{{/B}}

A．thE rElAtionship BEtwEEn FArmErs, wArD AnD sEArs.
B．thE DEvElopmEnt oF thE CAtAlog sAlEs BusinEss.
C．thE rElAtionship BEtwEEn thE CAtAlog AnD tExtBooks.
D．thE story oFChiCAgo rEtAilEr.