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: If Mona is comparing the erosion rates of two rocks and she notices that granite is softer then marble, which rock will water erode faster? 
 Option1: granite 
 Option2: marble 
 Explanation: The water erodes the softer rock faster than the harder rock.

A: granite
****
Q: Question: A person that has a large larynx will have what type of voice? 
 Option1: High 
 Option2: low 
 Explanation: The voice becomes deeper as the larynx in the throat grows larger.

A: low
****
Q: Question: Terry's system wastes 50% of its energy, while Rick's system wastes 75%. The less efficient system is 
 Option1: Terry's 
 Option2: Rick's 
 Explanation: The greater the wasted output energy, the less efficient the system.

A:
Rick's
****