D. "this was an uneasy secret..."
<span>The answer is letter D.
Rocket is the simple subject in the sentence above. Simple subjects are the most basic units in sentence constructions. A subject is a noun that talks about a person, place, thing, or idea. It tells us what the sentence going to be about and without it we cannot have a complete sentence that has sense. In the sentence above, the rocket is the subject of the sentence which is responsible for the effect of making space travel possible.<span>
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In the excerpt "Cyclops...lay down like a mast among his sheep.", the Cyclops is compared to a mast because of his size. He is not compared to Zeus (and it would be sacrilegious to compare a monster with the father of the gods); also, he is not surrendering. He is laying down because he has had his fill of Oydsseus's companions, not because he has been defeated.