Children sometimes play a card game called "Concentration" in which all of the cards are arranged face down in rows and columns. When a child takes a turn, he or she flips over two cards. If the two cards match (e.g

, both are aces), then the player gets to keep them. If the cards do not match, the player places them back in their original position face down. Whoever has the most cards at the end of the game is the winner. Whether or not a child finds a match on a given turn depends on a number of factors, including luck, strategy use, and ___.
a. working memory
b. sensory memory
c. long-term memory
d. metacognition

A