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: If Mona is comparing sandpaper with notebook paper and she determines that sandpaper is rougher then notebook paper, which object has more friction? 
 Option1: sandpaper 
 Option2: notebook paper 
 Explanation: Rougher surfaces have more friction between them than smoother surfaces.

SOLUTION: sandpaper

PROBLEM: Question: As you travel through the ozone layer the temperatures become 
 Option1: higher 
 Option2: lower 
 Explanation: The stratosphere contains the ozone layer, the temperatures increase as altitude increases.

SOLUTION: higher

PROBLEM: Question: Jimbo is going to the beach and he wants to ensure he has the lowest sun protection for his skin. Should he wear a sunscreen with a higher SPF or a lower SPF? 
 Option1: higher SPF 
 Option2: lower SPF 
 Explanation: A sunscreen with a higher SPF value protects the skin longer.

SOLUTION:
lower SPF