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: Jan poured a liquid solution into a bottle and the solution was very dense, so in the bottle it took up 
 Option1: more room 
 Option2: less room 
 Explanation: More dense water takes up less space than less dense water.
[EX A]: less room

[EX Q]: Question: Two hands are rubbing together fast, two other hands rub slowly, so the faster hands will make heat in amounts that are 
 Option1: larger 
 Option2: smaller 
 Explanation: Friction causes the molecules on rubbing surfaces to move faster, so they have more energy. This gives them a higher temperature, and they feel warmer.
[EX A]: larger

[EX Q]: Question: The new invention removed oil from the ocean, which caused _____ pollution. 
 Option1: less 
 Option2: more 
 Explanation: Greater use of oil and other fossil fuels causes more pollution.
[EX A]:
less