whiCh oF thE Following stAtEmEnts BEst ExprEssEs thE mAin iDEA oF thE pAssAgE
A．Country lEADErs shoulD BE rEADy to yiElD to puBliC opinion.
B．puBliC opinions shoulD BE CArEFully usED in poliCy mAking.
C．govErnmEntAl poliCiEs shoulD BE mADE in linE with puBliC thinking.
D．puBliC polls ArE usElEss unlEss thEy ArE usED For poliCy mAking.