The right option is; D.Trawling
Trawling is the method of commercial fishing that tends to produce excessive bycatch.
Trawling is a method of fishing in which a trawl (fishing net) is dragged through the water at a specific depth behind one or more trawlers. Trawling is usually used for commercial fishing, and it tends to produce excessive bycatch; a condition in which non target marine organisms such as seabirds are incidentally caught, while catching target species such as crabs and fish.