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: 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: Mary loves to dive in the ocean. What will happen to the water as she dives deeper? 
 Option1: darker 
 Option2: lighter 
 Explanation: The deeper you go, the darker the water gets.

SOLUTION: darker

PROBLEM: Question: Carter buries cans of soda in the dirt. The deeper the holes for the cans of soda, the pressure will be 
 Option1: lesser 
 Option2: greater 
 Explanation: As the rocks move deeper into the Earth, temperature and pressure increase.

SOLUTION:
greater