At Least Under Certain Circumstances, an Expert Chess Player Can

At least under certain circumstances, an expert chess player can memorize the positions of chess pieces on a board more rapidly and more accurately than a beginning chess player can. Why?

A) Only people with a superior memory can ever progress far enough to become expert chess players.
B) Practice at playing chess improves people's memory, not just in chess but in other regards as well.
C) Expert chess players learn to recognize familiar patterns that often occur in chess games.
D) Beginning chess players quickly become discouraged and do not even try to memorize the positions.