Here come the beagles boilin hard for the bluff. they come so fast upon bruh deer's track, they never have a chance to stop. two or three go on over the bluff, and they drop in the water right in front of bruh alligator's snout.

which phrase in the excerpt provides a clue about what boiling hard means?

“come so fast”
“have a chance”
“over the bluff”
“in the water”