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: Given two equal measures of water by volume, which would be lighter 
 Option1: ocean water 
 Option2: distilled water? 
 Explanation: Water becomes more dense when it is colder and when it has more salt.

A: distilled water?
****
Q: Question: As we turn down the volume on a stereo that we are listening to the sound waves get 
 Option1: smaller 
 Option2: larger 
 Explanation: As decibel levels get higher, sound waves have greater intensity and sounds are louder.

A: smaller
****
Q: Question: Sarah is carrying two tubs, one is filled with rocks, the other with feathers. The tub with rocks will be heavier because it is 
 Option1: more dense 
 Option2: less dense 
 Explanation: A given volume of a denser substance is heavier than the same volume of a less dense substance.

A:
more dense
****