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: Noah compares the density of the water in a pond during a hot July day and a cold winter morning. The water on the July day is
Option1: more dense
Option2: less dense.
Explanation: Lower temperature and higher salinity yield the densest water.
Example Output: less dense.

Example Input: Question: After the pile of tires at the landfill caught on fire, the smoke released into the air made the air quality
Option1: better?
Option2: worse
Explanation: More pollutants mean poorer air quality.
Example Output: worse

Example Input: Question: Jim puts his water in the oven 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:
speed up