American football strategy concerns the deployment of offensive, defensive, and special teams players and the execution of plays in American football. In American football, there are a vast array of positions, formations, strategies, plays and types of play calling systems that are utilized. If a strategy is for a particular game, it is known as a "game plan".
A "game plan" refers to a type of position and formation in American football.
It's incorrect because a game plan refers to a type of strategy used for a particular game. It's difficult because the question contains many words from the passage which might trick the system into assuming the statement must be correct.