You Recently Got a New Cell Phone and Have Had

You recently got a new cell phone and have had a great time learning how to use the camera and text messaging features.One day,you forget your phone and ask to use your friend's phone to send a text message.You think it will be easy,as your friend has the exact same phone as your old phone.However,you find you have a great deal of difficulty remembering how to do this.This memory problem is caused by

A) retroactive interference.
B) proactive interference.
C) decay.
D) lack of capacity to remember all the information.