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.

[EX Q]: Question: Antonio took several different measurements of an object. After he was finished, he realized that he forgot to label his measurements. Which of the following measurements could be the volume of the object? (A) 28 mL (B) 31 cm (C) 4 lbs. (D) 78 °F?
[EX A]: measurements, volume

[EX Q]: Question: Which of these items contains only a solution? (A) a jar of pickles (B) a bottle of juice (C) a bag of peanuts (D) a can of mixed fruit?
[EX A]: contains, solution?

[EX Q]: Question: In Alaska, there are fewer hours of daylight in the winter than in the summer. Which statement best explains why this difference occurs? (A) The Sun burns hotter in the summer. (B) The Sun moves below the horizon in the summer. (C) The Northern Hemisphere is closer to the Sun in the winter. (D) The Northern Hemisphere is tilted away from the Sun in the winter.?
[EX A]:
fewer, hours, daylight, winter, statement, explains