Plato's suggestion that knowledge is innate or remembered as a result of being triggered by experience is in response to a paradox he sets up for himself.  The paradox, now referred to as Meno's Paradox, has to do with the question of:
(A)how a person can remember anything about the realm of the Forms after the shock of being born into this world. (B)how knowledge of the Forms can ever be anything other than a generalization of experience. (C)how anyone can recognize the correct answer to a question without already knowing the answer. (D)how concepts bound to the realm of becoming have meaning only when associated with the realm of Being.
C