In a single $2-$person prisoner's dilemma game, what causes the parties $($firms$)$ to end up in a "hang$-$hang" worst case scenario?

Group of answer choices

Both parties independently following a pure firm level profit maximizing strategy

Both parties don't care about making a profit

Both parties independently following a profit minimizing strategy

Both parties "collaboratively" maximizing both their own profit and group profit at the same time