What Should the Salesperson Focus on to Differentiate ShipNow's Product

What should the salesperson focus on to differentiate ShipNow's product from other shipping services?

A) varying shipping speeds available to ShipNow customers
B) ShipNow's lower than average prices for equally fast shipping speeds
C) ShipNow's Internet tracking of packages through the company Website
D) auxiliary products that ShipNow sells,like boxes,envelopes,and packing tape
E) the added value the salesperson creates by making the shipping process easy for the customer