In order to bring the Ryan Hotel and Convention Centre up to industry standards, each guest room was redecorated with new wallpaper, drapes, carpeting, mattresses and sofas. Annie Delia, sales manager for the Centre, has recommended that guest rooms be upgraded with the addition of wide desks, voice mail, fax machines, and $24-$hour room service. From the viewpoint of most business travelers, this change would result in creation of a$($n$)$:

Select one:

a$.$

generic product.

b$.$

hyper$-$premium product.

c$.$

expected product.

d$.$

potential product.

e$.$

value$-$added product.