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: Katie wants to get light to turn to rainbow colors by using a lens to filter the light through. In order to get the most colors, Katie will use a lens that is 
 Option1: flat 
 Option2: curved 
 Explanation: The more curved the surface of a lens is, the more it refracts the light that passes through it.
[A]: curved


[Q]: Question: Will has a pully with 5 rope segments. Alan's pully has an equal size rope with 7 segments. Which person needs more force to do the same job? 
 Option1: Will 
 Option2: Alan 
 Explanation: The more rope segments on a pully that are helping to do the lifting work, the less force that is needed for the job.
[A]: Will


[Q]: Question: A piece of sandpaper was rubbed across a glass table, then the sandpaper was rubbed across some gravel. The friction will be less 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.
[A]:
the sandpaper and the glass table or