You are given an elementary science question along with a few answer options. List all the words from the question that are essential and sufficient for choosing the correct answer option. Keep in mind that essential words are necessary to understand the meaning of the given question. However, non-essential words provide little information needed to select the correct answer. You can think about it like this: If the question was in another language, knowing the meaning of which words were necessary and enough for you to understand the question and answer it?. If your answer consists of multiple spans of words from the question, separate those using a comma (", "). Do not generate any word that is not present in the question. Make sure that your response is contained in the given question and the words are in the same order as the question.
 Grammatical correctness is not important.

Input: Consider Input: Question: Which of these would help to prevent infections from occurring in small cuts and scrapes? (A) apply a cold ice pack (B) raise the injured area (C) apply pressure to stop bleeding (D) wash the area with warm, soapy water?

Output: prevent, infections, cuts, scrapes?


Input: Consider Input: Question: A giraffe will have a baby (A) elephant. (B) dog. (C) cat. (D) giraffe.?

Output: giraffe, baby


Input: Consider Input: Question: Base your answer on the information below and on your knowledge of science. A baseball strikes the roof of a car and dents it. The paint on the roof begins to crack and chip, exposing the metal. The exposed metal on the roof rusts, eventually causing a small hole in the roof. Which event is a chemical change? (1) The baseball strikes the roof. (2) The roof of the car dents. (3) The paint cracks and chips. (4) The exposed metal rusts.?


Output: baseball, strikes, roof, dents, paint, crack, exposed, metal, causing, hole, chemical, change?