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.

Example Input: 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.
Example Output: distilled water?

Example Input: Question: Jim is comparing two rivers. One has a steep slope and one has a shallow slope. Will the shallow slope or the steep slope provide less water availability? 
 Option1: steep slope 
 Option2: shallow slope 
 Explanation: A gentle slope favours slower flow of surface water, reduces erosion, and increases availability of water to plants.
Example Output: steep slope

Example Input: Question: Jim puts his water in the fridge for later. The molecules in the liquid 
 Option1: speed up 
 Option2: slow down 
 Explanation: When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser.
Example Output:
slow down