Read the following passage and questions, then choose the right answer from options, the answer should be one of A, B, C, D.

<passage>:
Sly, brave and truculent, the Qornt it to the alien's neck. Another wisp of stuff floated from Qorn's "Gentlemen, are any of you familiar with a race known as the Qornt?" "They were a warlike race known in this sector back in Concordiat "They have now reappeared—occupying the inner planet of this system!" Terrestrial territory...." Galactic Destiny, Greets the Terrestrials and, with reference to the presence in mandated territory of Terrestrial squatters, has the honor things?" "I have a suggestion," Magnan said. "Why not turn the reins of government over to the Verpp? They seem a level-headed group." "What good would that do? Qornt are Qornt. It seems there's always one among us who's a slave to instinct—and, naturally, we have to follow "Note, gentlemen, that these invaders have appeared on terrestrial the new Qornt stepping on our heels—" "I've lost the thread," Magnan said. "Who are the new Qornt?" "After estivating, the Verpp moult, and then they're Qornt, of course. The Gwil become Boog, the Boog become Rheuk, the Rheuk metamorphosize into Verpp—" "You mean Slun and Zubb—the mild-natured naturalists—will become warmongers like Qorn?" "Very likely. 'The milder the Verpp, the wilder the Qorn,' as the old saying goes." Qornt fleets are indetectible!" "We're up against something new, gentlemen! I've considered every of our own. I recommend a crash project. In the meantime—" "I'll have my boys start in to crack this thing," the Chief of the Confidential Terrestrial Source Section spoke up. "I'll fit out a couple of volunteers with plastic beaks—" "What do Qornt turn into?" Retief asked. we prefer a nice numerical advantage. Not this business of tackling you Terrestrials over on Guzzum—that was a mad notion. We had no idea what your strength was." "But now that's all off, of course," Magnan chirped. "Now that we've action is clear, but it remains to be implemented. We have a population "Only a dead Qornt stays home when Attack day comes. And even if Centers—all with their own leaders. No, gentlemen, the Invasion is "Nonsense! A diplomat is immune to heroic impulses. Take Retief along. "You expect me to make my way back alone?" turned—and collided with the eight-foot alien, coming in fast from the "Those undoubtedly are the most bloodthirsty, aggressive, merciless "Diplomats? Surely you jest." "Aren't you a Qornt?" "I? Great snail trails, no!" More stifled whistles of amusement escaped the beaked face. "Both Zubb and I are Verpp. Naturalists, as it happens." "You certainly "Oh, not at all—except perhaps to a Terrestrial. The Qornt are sturdily built rascals, all over ten feet in height. And, of course, they do nothing but quarrel. A drone caste, actually." "A caste? You mean they're biologically the same as you?" "Not at all! A Verpp wouldn't think of fertilizing a Qornt." "I mean to say, you are of the same basic stock—descended from a common ancestor, perhaps." "We are all Pud's creatures." "What are the differences between you, then?" "The outer planet of this system." "Oh, yes. We call it Guzzum. I had heard that some sort of creatures "That would be the invasion of Smorbrod," Magnan said. "And unless we evacuees!" gather you as specimens." "You should have known better than to tackle that fierce-looking with their ceremonial feasting. I'm afraid no one will take any notice "Do you mean to say," Magnan demanded, "that these ferocious Qornt, who have issued an ultimatum to the Corps Diplomatique Terrestrienne—who openly avow their occupied world—would ignore Terrestrials in their "Nonsense, Slun!" Zubb pushed forward. "I'll escort our guests to Qornt Hall." He twittered briefly to his fellow Verpp. Slun twittered back. "I don't like it, Retief," Magnan whispered. "Those fellows are plotting mischief." "Threaten them with violence, Mr Magnan. They're scared of you." "That's true. And the drubbing they received was well-deserved. I'm a "This is Tarroon?" creatures must devote all their talents to warlike enterprise." high-pitched screeching. "Softly, now. We approach Qornt Hall. They scheduled an invasion for next month." "Look here, Zubb." Magnan shook a finger at the tall alien. "How is it "Hmmmm. That's a good question. So far, none have survived Qornthood." "These few hotheads are permitted to embroil the planet in war?" "Oh, they don't embroil the planet in war. They merely—" spears over patinaed hauberks, pitted radiation armor, corroded power three strumming slender bottle-shaped lutes, or pranced an intricate-patterned dance, unnoticed in the shrill uproar as each of "Certainly. What other kind would the Qornt bother with?" "They're fully automated twenty-thousand-ton all-purpose dreadnaughts. They mount a variety of weapons. The Qornt are fond of that sort of thing. Each of the Qornt has his own, of course. They're virtually though these brutes employ a battle armada as simpler souls might a set "See here, Zubb! We're diplomats!" Magnan started. you may goad him to a frenzy." "By no means," Zubb whistled. "I much prefer to observe the frenzy of the Qornt when presented with the news that two peaceful Verpp have been assaulted and kidnapped by bullying interlopers. If there's anything that annoys the Qornt, it's Qornt-like behavior in others. Now "You'll face the wrath of Enlightened Galactic Opinion!" staring. An inverted pyramid of tumblers blinked as Retief swung past, followed by Magnan and the tall Verpp. The shrill chatter at the table faded. "So," Qorn hooted in a resonant tenor. "You come from Guzzum, eh? Or !" "Stay back!" Qorn hooted. "Stand over there where I can keep an eye on don't want peace! I've had a surfeit of peace these last two centuries! "I guess so," grunted a giant Qornt in iridescent blue with bit of sport to be had here, lads. What shall we do with them?" us home mutilated! What a barbaric proposal!" "Oh, I doubt that," the blue-and-flame Qornt said. "Why should they?" he hooted. "I'll wager they came here to negotiate a surrender!" "We plan to use this planet for target practice," Retief said. "A new type hell bomb we've worked out. Have all your people off of it in seventy-two hours, or suffer the consequences." IV he honked. "Evacuate, hell! I can field eighty-five combat-ready ships!" "We'll take you on!" Qorn French-horned. "We're the Qorn! We glory in "Hogwash," the flame-and-blue Qorn cut in. "If it wasn't for you, Qorn, clacking against the polished floor. The other aliens—both servitors combatants. Qorn hissed and charged. Retief whirled aside, then struck the alien's

<question>:
What race are the aliens that attack the expedition?

<options>:
A Zubb
B Human
C Qornt
D Verpp

<answer>:

D