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.

[Q]: Question: Mark wants to find out how tall his plant grows each day. Which of the following should Mark do in order to answer his question? (A) Use a balance to measure the mass of the plant every day. (B) Use a light meter to measure how much light the plant receives. (C) Add the same amount of water to the plant every day. (D) Use a ruler to measure the plant every day.?
[A]: find, tall, plant, grows, day.


[Q]: Question: A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of her walk than in the second 15 minutes. What can she conclude about her walk? (A) She walked over many hills. (B) Her average speed was faster during the first half of her walk. (C) She walked in two different directions. (D) She was walking at a constant speed.?
[A]: walked, traveled, farther, first, 15, minutes, conclude, walk?


[Q]: Question: When large areas of the rainforests are cleared and burned, climate can be affected. Which best explains how rainforest destruction can contribute to the greenhouse effect? (A) by threatening native plants and animals (B) by increasing the rate of soil erosion (C) by increasing the water levels in oceans (D) by releasing carbon into the atmosphere?
[A]:
explains, rainforest, destruction, greenhouse, effect?