You are using this source for an essay on Lamarr. Which subheading does not fit under your heading Secret Communications System A) patent
B) War Bonds
C) Player Piano
D) Frequency hopping

Plz im failing ela prompt: in a well-developed paragraph using the r. a.c. e. method, explain the allusion found in the advertisement. be sure to include an explanation of the character and how the allusion is used to sell the product. advertisement: excerpt from the christmas carol: use this information to deepen your understanding of the character. oh! but he was a tight-fisted hand at the grindstone, scrooge! a squeezing, wrenching, grasping, scraping, clutching, covetous, old sinner! hard and sharp as flint, from which no steel had ever struck out generous fire; secret, and self-contained, and solitary as an oyster. the cold within him froze his old features, nipped his pointed nose, shriveled his cheek, stiffened his gait; made his eyes red, his thin lips blue; and spoke out shrewdly in his grating voice. a frosty rime was on his head, and on his eyebrows, and his wiry chin. he carried his own low temperature always about with him; he iced his office in the dog-days; and didn’t thaw it one degree at christmas. race: use this organizational method to guide your writing- r – restate the prompt a – answer the prompt/questions c – cite evidence e – explain the evidence write your response here: