At the Time of Her Graduation,Julia Obtained Permission from Several

At the time of her graduation,Julia obtained permission from several people who will serve as references for her.Two years later,she is interviewing for a new position and knows that some employers she has interviewed with will be performing background checks on her.In regard to her references,she should

A) do nothing at this point.
B) send a message to her references, letting them know that requests for information will be forthcoming, and attach a current résumé.
C) select all new references.
D) call each reference to apologize for the inconvenience.