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 sentence from a student’s essay about “the treasure of lemon brown.” greg sees his father differently after he speaks with lemon brown. what revision should the student make to clarify the main idea of this sentence? replace “sees his father differently” with “appreciates his father.” add the phrase “at the end of the story” after the word “differently.” change the wording of “speaks with” to “has a conversation with.” remove “after he speaks with lemon brown” from the sentence.