Cargo of Death is a Bonus Quest. You do not need to succeed to complete this quest.
Cargo of Death
"My [lady/lord], a trade ship of ours is due to dock in Qarth tomorrow, but I've heard a disturbing rumor that its crew suffer from the grey plague."
Quest Duration: 45m
Realm Alignment QuestShould you select the Realm option, the following Bonus Quest will activate:
[Your Sworn Sword] stopped your trade ship from docking at Qarth. The crew is dead and the ship destroyed, along with its cargo, but plague may have been contained.
[Your Sworn Sword] was unable to stop your trade ship from docking at Qarth. Your cargo will sell for a profit but that may be small comfort if sickness spreads.
Cunning Alignment QuestShould you select the Cunning option, the following Bonus Quest will activate:
[Your Sworn Sword] successfully silenced all rumors of any plague, and your ship docked at Qarth. Sickness may spread, but your cargo brought a profit.
[Your Sworn Sword] was unable to stop rumors of plague aboard your trade ship. The Qartheen port patrol ships destroyed the ship and its crew before it docked.