In a Study Comparing the Memory Spans of Preschool and Elementary

Multiple Choice

In a study comparing the memory spans of preschool and elementary school children, the latter group consistently scored better. This apparent increase in memory span with age could be explained partly by how

A) peer groups play a part in short-term memory.
B) older children rehearse the digits from their tests more than younger children do.
C) elementary schools practice scaffolding.
D) memory-span tests are not always an accurate measure of short-term memory.