TASK DEFINITION: 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.
PROBLEM: Question: Jeff heated the pot of boiling water. What happens to the dissolved oxygen contained within the water? 
 Option1: it increases 
 Option2: it decreases 
 Explanation: Warm water cant hold as much dissolved oxygen as cool water, so an increase in the temperature of water decreases the amount of oxygen it contains.

SOLUTION: it decreases

PROBLEM: Question: A piece of sandpaper was rubbed across a glass table, then the sandpaper was rubbed across some gravel. The friction will be greater between 
 Option1: the sandpaper and the glass table or 
 Option2: the sandpaper and the gravel. 
 Explanation: Rougher surfaces have more friction between them than smoother surfaces.

SOLUTION: the sandpaper and the gravel.

PROBLEM: Question: Tina had her cancer discovered late. Her chances of a cure are likely _____ than if she had found it sooner. 
 Option1: higher 
 Option2: lower 
 Explanation: The sooner cancer is treated, the greater the chances of a cure.

SOLUTION:
lower