Research on autobiographical memory indicates that may lead to the offset of infantile amnesia.
a. the development of recognition
b. the increased reliance on verbatim memories with age
c. the emergence of an implicit memory system
d. learning to structure memories in narrative form

D. learning to structure memories in narrative form
childhood amnesia , also called  infantile amnesia , is the inability of adults to retrieve episodic memories before the age of 2–4 years, as well as the period before age 10 of which adults retain fewer memories than might otherwise be expected given the passage of time