The admission fee for each person was $6, so Denise and Stacey together spent $6 + $6 = $12 on admission fees. 7 rides each at a cost of c dollars per ride gives a total cost of 7c + 7c = 14c. Stacey played 3 games at a cost of g dollars per game, which is a total cost of 3g. Denise played 2 games at a cost of g dollars per game, which is a total cost of 2g. Adding all of these costs together, the expression for the total amount of money that Denise and Stacey spent at the carnival is:
$12 + 14c + 3g + 2g = $12 + 14c + 5g
Therefore, the correct answer is C. 14c + 5g + 6.