TASK DEFINITION: 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.
PROBLEM: Question: Theresa decreased the amount of water in her pool. Rock would likely melt 
 Option1: faster 
 Option2: slower 
 Explanation: As the amount of water increases, the melting point of rock decreases.

SOLUTION: slower

PROBLEM: Question: John was viewing a patient's vital signs at the hospital. He could see clearly that the less oxygen to the cells, the pulse rate would become 
 Option1: Higher 
 Option2: Lower 
 Explanation: This causes the delivery of less oxygen to the cells, and this stimulates the heart rate via adrenalin, so that pulse rate increases in an effort to deliver enough oxygen to cells.

SOLUTION: Higher

PROBLEM: Question: Will has two screws of the same length. One has 20 threads; the other has 200 threads. The screw with _____ threads likely needs more force to penetrate wood. 
 Option1: 20 
 Option2: 200 
 Explanation: Therefore, if the threads on a screw are closer together, you need to apply less force to penetrate the wood or other object.

SOLUTION:
20