The owner of a video game store creates the expression −2x^2 + 24x + 174 to represent the store's weekly profit in dollars, where x represents the price of a new video game. choose the equivalent expression that reveals the video game price that produces the highest weekly profit, and use it to determine the price.

a) −2(x^2 − 12x) + 174; x = $12
b) −2(x^2 − 12x − 87); x = $87
c) −2(x − 6)^2 + 246; x = $246
d) −2(x − 6)^2 + 246; x = $6
i think it's c or d.