Most adults remember very few events from early childhood. Studies on mice support which explanation for this infantile amnesia?

(a) In infants, the hippocampus is not yet mature enough to form long-term memories.

(b) Infants do not yet have mature sense organs.

(c) Infants have not yet formed a sense of self.

(d) Infants form many new neurons that not only facilitate new learning but also forgetting.