What are ya'll arguing? That we should have won the game even with our C+ effort? Or that we should never have a C+ effort?
C+ effort?
Don't you mean a C+ performance (or, execution)?
A football team's performance/execution depends upon many variables that cannot be completely controlled, whereas effort depends only upon a player's motivation/determination and is completely controllable by each individual football player.
Thus, a player's effort (or, collectively, a team's effort) should always be A+, because it's the one thing in a football game he CAN control.
Concerning performance/execution, isn't every play in a football game essentially one-on-one matchups between individual players on each team? During each play, an individual player either makes the play or gets the play made on him.
To win a football game, each of our individual football players have to beat the guy in front of him on each play (or, most plays).
Winners make plays. Losers don't.