The Research by Ericsson and Colleagues (1980) Examined the Ability

The research by Ericsson and colleagues (1980) examined the ability of a college student to achieve amazing feats of memory by having him remember strings of random digits that were recited to him. They found that this student used his experience with running times to help him retain these strings of numbers. The significance of this finding was that

A) experts show larger primacy and recency effects than beginners.
B) knowledge in an area of expertise increases a person's digit span.
C) expertise with some material reduces susceptibility to proactive interference with that material.
D) chunking requires knowledge of familiar patterns or concepts.