I would go with A.
Small dogs can get into fights, but so can big dogs. And medium fogs-any dog can get into a fight.
Hungry dogs can wag their tails for bones, but it never said that these two dogs were hungry.
Many dogs do not get a long. True, but it never implied that in this passage-there were only two dogs.
A is right because there were two angry dogs and they did get distracted by food.
I hope this helped :)