My thoughts
All of the above
Fumbling (it has got to stop tuff to win in this league if you have 4 turnovers in a game)
Trash talk (or bulling basucally grow up we are better than them and act your age.)
Penalties (although it was a low number it still gives the other team a first down and puts our team in a hole.)
And yes tackling. (MOSTLY BECAUSE THE D HAD LITTLE PRESEASON WORK.)