Which of the Following Supports the Idea That Age-Related Improvement

Multiple Choice

Which of the following supports the idea that age-related improvement in working memory capacity at least partially reflects exposure to and familiarity with the material to be remembered?

A) Ten-year-old chess experts can remember more pieces than adults who do not play chess,even though the children's digit spans were lower.
B) Young children can remember only 3-4 digits,whereas teenagers can remember 7 -8 digits.
C) Performance on working-memory tasks increases throughout adolescence before leveling off.
D) All of the answers are correct.