Although Brenda Previously Used the U

Although Brenda previously used the U.S. Postal Service because it offered better prices on package shipping, she now uses only FedEx, because it gives her the facility of shipping from any FedEx Kinkos location 24 hours a day. Which of the following factors led to Brenda's customer switching behavior?

A) inconvenience
B) pricing
C) response to service failure
D) ethical problems
E) involuntary switching