whiCh oF thE Following stAtEmEnts is truE
A．hAlF oF thE AmEriCAn workErs hAvE promisED to Buy A nEw plAnE For thE DEltA AirlinEs.
B．thE workErs oF DEltA AirlinEs hAvE promisED to hElp Buy A nEw plAnE For thEir CompAny.
C．hAlF oF thE workErs oF DEltA AirlinEs hAvE promisED to pAy hAlF thE monEy For A nEw plAnE.
D．hAlF oF thE workErs oF DEltA AirlinEs hAvE Bought A nEw plAnE For thE CompAny.