instruction:
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.
question:
Question: When Dean went to the top of the mountain and reached the peak, he noticed that the bottom of the mountain, compared to the top, had snow in amounts that were 
 Option1: larger 
 Option2: smaller 
 Explanation: Glaciers often form in the mountains because higher altitudes are colder and more likely to have snow that falls and collects.
answer:
smaller


question:
Question: Mike wants his voice to travel slowly, so he will speak in a room that is 
 Option1: colder 
 Option2: warmer 
 Explanation: For a given medium such as air, sound has a slower speed at lower temperatures.
answer:
colder


question:
Question: The rocks that are on the surface of a volcano are 
 Option1: young 
 Option2: old 
 Explanation: The upper rock layers are much younger.
answer:

young