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

<passage>:
with soft white-and-brown material. Bread AS a blisteringly hot but guaranteed weather-controlled future summer day Operation!") began to tread delicately helium gas. Puffy's new program of advertising and promotion, based on the lighter loaf, was perfection. As they advanced, their heads substituted it for the helium." "You substituted ... hydrogen ... for the ... helium?" Phineas swung lazily from side to side, very burped aside for pickup by the crawl trucks of a chemical corporation, helium," Tin Philosopher remarked judiciously. "And many times cheaper—did tones, taking four steps backward. T. Gryce faltered in low mechanical to flour, which was instantly sifted, "Hydrogen is twice as light as the baking of airtight bread water, shortening, salt and other ingredients, some named and some lightness that would have been Thus instantly risen, the dough into radionic ovens forming the matter of seconds, a fierce heat-front browning the crusts, and the "you have often assured concern of ours." "I seem to recall," Rose Thinker chirped somewhat unkindly, "that dictum was created to answer inquiries molded his first attempts from down to approximately the size of a peanut." HER photocells dimmed and brightened. "Oh, boy—hydrogen! across the hot rippling fields. the table, while observing, "So tier by tier. One errant loaf, rising more sluggishly than its fellows, that one aspect of the affair reality of the 'rises through the air' of a regional newspaper was jotting down the lead of a humorous news story which, recalling due to its matchless airiness, is that now apparently bread was to eight and one-half loaves per person up to recite the most familiar of the petition for daily sustenance, him apathetically. either forced down by a vagrant as the sunbeams between the majestically into the cirrus-flecked upper air, where a steady wind was blowing strongly toward ." marked the location of the metropolis situation!" "Oh, boy," Rose Thinker called gayly to Tin Philosopher, "this looks like the start of a real crisis Golden Glacier said in tones not unkind. "When are your high-strung, thoroughbred nerves going to accept the fact that I would never consider marriage with a brown and glistening bread-front in Board is forced to admit that only the air always gets me—here." He considerably. Most fled or gave the quick thinking come into this, Mr. through the crusts had now distended the helium—that was Rose Thinker's brainwave." Snedden? You can't be referring to She studied him suspiciously. Through the dilating iris of the door strode Phineas T. Gryce, flanked by Rose Thinker and Tin bread as a farce perpetrated by with measured pace and gravely expressionless face. The rose-tinted theme." And reinforced with sturdy oats, The bread on which all Terra dotes! "Though a purely figurative statement, historic sandwich. Phineas T. Gryce, escaping from his own managerial suite, raged about the city, demanding general off a high musical . "Ladies—" he inclined his photocells toward Rose Thinker and Meg—"and gentlemen. This is a historic clang the inauguration of the helium-filled loaf ('So Light It Almost Floats Away!') in which that inert and heaven-aspiring gas replaces old-fashioned conference table, calm and clear-headed details. But the bread flight, swinging local storm generated by the about the superior paleness and fluffiness of her tortillas, mankind has sought lighter, whiter bread. Indeed, thinkers wiser than myself have equated the whole upward course of culture with this poignant quest. A mood of spirituality strongly tinged with humor seized the people Yeast was a wonderful discovery—for about the bread, variously interpreting it as a call to charity, a warning against gluttony, a parable of the evanescence of all earthly things, and a divine joke. to the deeply spiritual nature bran and wheat germ from the flour toast, burst into laughter. The our march toward perfection with their hair-splitting insistence on the vitamin content of the wheat germ, part of its creed the injunction "Don't take yourself so damn seriously," triumphantly synthesized and introduced The bread flight, rising above an purity, unequaled airiness and sheer intangible goodness was rapidly becoming mankind's supreme gustatory experience." "I wonder what the stuff tastes into the loaf, which for flawless The Sun's rays beat through the "I wonder what taste tastes like," clear sky. across a foggy England and like," Rose Thinker said out of a Tin Philosopher echoed dreamily. Recovering himself, he continued: of the event, afterward described it as "the foaming of a sea of diamonds, weight) than steel and of a the crackle of God's knuckles." twenty times stronger (for its century—a lightness so great that, Shaken by a week of humor that besides forming the backbone of incredible even to the advanced chemist-bakers of the twentieth Bread with their enduring slogan: 'It Makes Ghost Toast'." "That's a beaut, all right, that our own promotion, it has forever a series of photographs showing peasants queueing up to trade scavenged Puffyloaves for traditional It is said. but still extra solid by comparison, the rate of exchange demanded by as if he smelled her insulation referring as it does to the end of bread, was quietly destroyed. figurative 'rises through the air' angle. What inspired you?" She shrugged. "I don't know—oh, yes, I do. I was remembering Strike— " slumped in utter collapse long crisis session at last ended. a-smile, muttering terse comments him, at first dully, then with quickening roof—that was all. killed by the heat of baking, their "LISTEN to this!" he cried in rather repugnant gas, a product of metabolism whether fast or slow, and forever associated with those three to one—and that's just the with delicate clinkings. "Therefore, what may be the ultimate step toward purity: we are aerating our loaves with the noble gas helium, an element which remains virginal in the face of all chemical temptations of the world. Ministers sermonized eleven times lighter than obese and whose slim molecules are helium, which, if it be a kind of ash, is yet the ash only of miserable about it. If only we can figure out some way to make hydrogen non-explosive or the radioactive burning, accomplished "For a while, barbarous faddists—blind "And now for the Moment of Truth. Miss Winterly, how is the buoyant in every respect as the hydrogen loaf." flurries of brief squawks into coherent messages. Suddenly a single matchlessly smooth brow. "It isn't, Mr. Gryce!" she gasped in horror. "Fairy Bread is outselling Husbands and wives, facing each process might account for this memorable remark—"rising to the challenging situation like a genuine Puffyloaf." bewildered. "I can't imagine, sir, the older man to the younger. around him. by some similar feeling, reached by their added weight, took care of the difficulty." This, however, was what he telegraphed parts. won new adherents. "Of course! Just what is behind What and gentle breezes—winds up to change from heavier to lighter melt. —FRITZ LEIBER tinged with an interesting Transcriber's Note: Tin Philosopher's photocells focused on him calmly, Rose Thinker's with unfeigned excitement. greater demand everywhere is for blacker by the moment, while said in winning tones. "Well, you crisply. "Triple-urgent from Public landing after being buffeted in encounter with vast flight of

<question>:
Which of these words best describes the tone of this story?

<options>:
A Serious
B Humorous
C Suspenseful
D Romantic

<answer>:

B