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


[Q]: Question: Decreasing the mass of an object causes its inertia to 
 Option1: increase 
 Option2: decrease 
 Explanation: The full box is harder to move because it has greater mass and therefore greater inertia.
[A]: decrease


[Q]: Question: When there is a lot of sheen on a piece of glass it is: 
 Option1: dull 
 Option2: reflective 
 Explanation: Increases the sheen on leaves to make them more reflective.
[A]:
reflective