Concept:Supply of labour to an occupation increases when the job becomes more attractive to workers.Explanation:Welfare packages are non-monetary benefits like medical care, housing, and transport. When such packages improve, the overall reward from working in that occupation increases. Workers therefore move into the occupation, causing the supply of labour to rise. Cutting holiday entitlement or having fewer monetary benefits would reduce attractiveness. A rise in unemployment benefit affects the choice between working and not working, not the supply to a specific occupation.Answer:C. welfare packages improve.