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: Charles sees an atom through the microscope that is the biggest he's ever seen. The valence electrons in this atom are likely _____ the nucleus 
 Option1: far from 
 Option2: close to 
 Explanation: In bigger atoms, valence electrons are farther from the nucleus.
[A]: far from


[Q]: Question: The electrons with the _____ energy are nearest to the nucleus. 
 Option1: most 
 Option2: least 
 Explanation: Electrons at higher energy levels, which are farther from the nucleus, have more energy.
[A]: least


[Q]: Question: When water loses salt the water becomes 
 Option1: more dense 
 Option2: less dense 
 Explanation: If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser.
[A]:
less dense