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.

[EX Q]: Question: If Mona is speaking to Milo in a soft tone and then decreases the amplification of the sound waves leaving her mouth, what will happen to the loudness level of her voice? 
 Option1: increase 
 Option2: decrease 
 Explanation: Amplified sound waves have more energy, which increases the intensity and loudness of the sounds, so they are easier to hear.
[EX A]: decrease

[EX 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.
[EX A]: it can't be used to date old specimens

[EX Q]: Question: Shirley wants to make sure that her frequencies are high, so she will have her wavelengths for the electromagnetic waves be 
 Option1: shorter 
 Option2: longer 
 Explanation: Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.
[EX A]:
shorter