You are given a question or fill-in-the-blank question, two answer options (Option1 and Option2) and an Explanation. Your task is to find the correct answer (return the string of the correct option, not option1/2) for the given question from the given options and using explanation.

Q: Question: Fred has an isotope that decays quickly. What is likely true about it? 
 Option1: it can be used to date older specimens 
 Option2: it can't be used to date old specimens 
 Explanation: Because these isotopes decay more slowly, they can be used to date much older specimens.

A: it can't be used to date old specimens
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Q: Question: If Mona is comparing two containers and she knows her jelly jar is larger then her baby food jar, which one contains less space? 
 Option1: jelly jar 
 Option2: baby food jar 
 Explanation: In the larger container we will still have the same number of gas particles, but now they are filling a much larger space.

A: baby food jar
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Q: Question: When an animal is larger it needs to have a 
 Option1: smaller skeleton 
 Option2: larger skeleton 
 Explanation: The larger the animal, the heavier the exoskeleton, making movement more difficult.

A:
larger skeleton
****