Research Suggests That Older Children Perform Better on Memory-Span Tasks

Research suggests that older children perform better on memory-span tasks than younger children.Which of the following BEST explains this finding?

A) Older children are more susceptibility to suggestion than younger children.
B) Older children rehearse the information more than younger children.
C) Older children have more accurate implicit memory than younger children.
D) Older children can retrieve information from long-term memory faster than younger children.