Home Garden Center Uses Mobile Customer Service Representatives in All

Home Garden Center uses mobile customer service representatives in all of its stores.These floating personnel walk the huge warehouse with smart phones answering customer questions,pointing out locations of items,and directing customers to checkout.Which condition would MOST threaten the use of the mobile customer service at Home Garden Centers in the next business season?

A) Incoming employees seem less technically savvy with mobile devices.
B) Several store departments are swapping locations within the store facility.
C) The size of the smartphone is causing some employees to continually drop the device.
D) The current model of smartphone uses an operating system that no longer supports the store's customer service application program.
E) There is a slight increase in the theft rate of smartphones from the stores.