At Some Catalog Retailers, Employees on Roller Skates Called Pickers

At some catalog retailers, employees on roller skates called pickers are handed a printout of the products a customer wants, and then the pickers skate through large warehouses accumulating the desired products into one central location. The pickers are engaged in ________.

A) human resource management
B) nonessential operations
C) essential operations
D) value proposition
E) facilitating functions