Why Does the Memory Strategy of Elaboration Emerge Fairly Late

Why does the memory strategy of elaboration emerge fairly late in development?

A) Young children may not have the knowledge base needed for generating elaborative mediators.
B) Young children may not have the creativity needed to generate elaborative images.
C) Young children may be too creative and generate too many elaborative mediators to be effective.
D) Elaboration often relies on three-dimensional imagery rather than words