Owen has trouble remembering a friend's new phone number; he keeps recalling the old number instead. Completing a rental application, Pippa finds she can't recall one of her previous addresses, as she's had several addresses since. Owen is experiencing _____ interference. Pippa is experiencing _____ interference. a. retrograde; anterograde interference b. pro-active; retro-active interference c. pro-active; pro-active interference, as well d. retro-active: pro-active interference