Trinidad and Tobago will need to win this game and hope that Bermuda is able to get something, but not too much, out of its game against Costa Rica. Anything other than a win for the Soca Warriors against El Salvador, however, and the final match in Group C - Costa Rica vs Bermuda - is irrelevant to them: they're going home.
They might be going home anyway, since progression depends not just on three points against the Salvadorans, but also finishing ahead of Bermuda and Costa Rica, and that will depend on not just the result of that game going T&T's way (Costa Rica must not win) but also tiebreakers favoring the Soca Warriors.
It's a long shot, not least because El Salvador has won its opening two games of the 2017 CONCACAF U-20 Championship and is favorite to win its third.
On the bright side, for New York Red Bulls fans, once T&T's interest in this tournament is over, we should learn whether RBNY Academy product Noah Powder is turning pro with the Red Bulls or will start his career elsewhere.