Which technology allows companies to identify, track, and monitor objects within the

supply chain but also requires large amounts of labour to implement and maintain?

a$)$ Hand$-$held barcode readers

b$)$ Radio frequency identification $($RFID$)$ tags

c$)$ Electronic data interchange $($EDI$)$ systems

d$)$ Planning and Execution software $($PES$).$

e$)$ Management information systems $($MIS$)$