Which Statement Supports the Idea That Age-Related Improvement in Working

Multiple Choice

Which statement 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 three to four digits, whereas teenagers can remember seven to eight digits.
C) Performance on working-memory tasks increases throughout adolescence before leveling off.
D) All of the answers are correct.