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: Will hit the ball with the bat. If he hit the ball with greater force, the ball will experience _____ acceleration. 
 Option1: less 
 Option2: more 
 Explanation: The greater the net force acting on the object, the greater its acceleration will be, but the mass of the object also affects its acceleration.
[A]: more


[Q]: Question: A chemist compared two substances in the lab. Which substance will have a higher concentration of hydrogen ions? 
 Option1: the substance with the higher pH 
 Option2: the substance with the lower pH 
 Explanation: The lower the pH value is, the greater is the concentration of hydrogen ions and the stronger the acid.
[A]: the substance with the lower pH


[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 least 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]:
flat