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.

[EX Q]: Question: In ancient times, there was worse medicine. This means there was a _____ death rate. 
 Option1: lower 
 Option2: higher 
 Explanation: More recently, the death rate has fallen because of the availability of more food and medical advances.
[EX A]: higher

[EX Q]: Question: As the rocket falls down through the troposphere and gets nearer to the Earth's surface, the air will be 
 Option1: warmer 
 Option2: cooler 
 Explanation: Air in the troposphere is warmer closer to Earths surface.
[EX A]: warmer

[EX Q]: Question: Compared to a very soft stone like limestone, diamonds, which are the hardest stone, would 
 Option1: erode more slowly in water 
 Option2: erode more quickly in water? 
 Explanation: The water erodes the softer rock faster than the harder rock.
[EX A]:
erode more slowly in water