Which of the following statements best describes proactive interference?

A. While learning Italian, Lucy realizes she is losing her ability to speak Spanish.
B. Having majored in French history in the 1960s, Ken finds it difficult to grasp new discoveries about Marie Antoinette.
C. Lauren can't recall the name of her new math teacher.
D. Carter can't concentrate on geometry because he's thinking about asking Gina out on a date.