&nBsp;work pACkAgEs ArE usED to:&nBsp;
A rEprEsEnt units oF work At A lEvEl whErE work is pErFormED.&nBsp;
B ClEArly Distinguish onE work pACkAgE From All othErs AssignED to A singlE FunCtionAl group.&nBsp;
C limit thE work to BE pErFormED to rElAtivEly short pErioDs oF timE.&nBsp;
D All oF thE ABovE.&nBsp;
E A AnD B only&nBsp;