Eileen went to Las Vegas for Spring Break. While there she lost a bet at the roulette wheel, resulting in a shortfall of funds needed for the Fall semester's tuition. She bet on red, but the roulette wheel came up with six blacks in a row. Wanting to get her money back, Eileen doubled her bet each time on red, justifying that red would come up soon. Her actions reflected her belief that the odds are 50/50 that red and black should occur over a large number of spins of the wheel. Eileen's strategy appears to have be based on ________.

a. a magical thinking perspective

b. the representativeness heuristic

c. the advice of a "how to win" self-help book

d. the availability heuristic