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: Joe is pulling a rubber band with his fingers. When does the band have the most elastic force? 
 Option1: at rest 
 Option2: when stretched 
 Explanation: The elastic force increases the more the material is stretched or compressed.
[A]: when stretched


[Q]: Question: If Mona is examining her arteries and she looks at ones that are farther away from her heart, what happens to the size of the arteries? 
 Option1: smaller 
 Option2: larger 
 Explanation: Further away from the heart, the aorta branches into smaller arteries, which eventually branch into capillaries.
[A]: smaller


[Q]: Question: John was playing with alkanes in his lab. If he decreased the amount of carbon atoms in an alkane, what would happen to the boiling point of that alkane? 
 Option1: decrease? 
 Option2: increase 
 Explanation: Alkanes with more carbon atoms have higher boiling and melting points, so some of them are solids at room temperature.
[A]:
decrease?