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: Peter added salt to his juice one morning. The mixture became _____ dense. 
 Option1: more 
 Option2: less 
 Explanation: If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser.
[A]: more


[Q]: Question: If Mona shines a light through both wool and cotton and determines that cotton is more dense then wool, which material will the light move faster through? 
 Option1: wool 
 Option2: cotton 
 Explanation: The more dense the medium, the slower the light moves.
[A]: wool


[Q]: Question: When water is eroding down a river it will do less cutting if it is 
 Option1: low 
 Option2: high 
 Explanation: In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.
[A]:
low