Which of the Following Is an Example of a Person

Which of the following is an example of a person who is in the cognitive stage of skill acquisition?

A) George is just beginning to learn how to play the guitar and has to concentrate hard to avoid hitting the wrong notes.
B) James learned how to play guitar last year. Even though he cannot play and sing at the same time, he has become quite adept at strumming.
C) Joan has been playing guitar well for years but still needs to play from sheet music when playing with friends.
D) Carrie is a great guitar player whose performance does not require much of her attention.