Will mark brainliest and 99 points.
which of the following best summarized the main idea of the passage? * a. “researchers use wind tunnels to learn more about how an aircraft will fly.”b. “special instruments are often used to measure the force of the air on the object.”c. “nasa engineers tested ideas for the design of ares in wind tunnels.” d. “long after the first design work is finished, nasa can still use wind tunnels.”

Read the excerpt from "the love song of j. alfred prufrock." and indeed there will be time to wonder, “do i dare? ” and, “do i dare? ” time to turn back and descend the stair, with a bald spot in the middle of my hair— [they will say: “how his hair is growing thin! ”] my morning coat, my collar mounting firmly to the chin, my necktie rich and modest, but asserted by a simple pin— [they will say: “but how his arms and legs are thin! ”] do i dare disturb the universe? in a minute there is time for decisions and revisions which a minute will reverse. which lines indicate that the speaker is concerned about what others think of him?