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 taking the patients blood pressure and other vital signs. He saw that the lower the blood volume, the pressure was 
 Option1: Greater 
 Option2: Less 
 Explanation: This is because the lower blood volume in the vessels exerts less pressure on the vessel walls.

SOLUTION: Less

PROBLEM: Question: The blood vessels near the top of the skin do what when it's cool? 
 Option1: enlarge 
 Option2: contract 
 Explanation: When your brain senses that your body temperature is increasing, it sends messages to the blood vessels in the skin to increase in diameter.

SOLUTION: contract

PROBLEM: Question: When the villagers are living longer, the food source is likely 
 Option1: great 
 Option2: small 
 Explanation: More recently, the death rate has fallen because of the availability of more food and medical advances.

SOLUTION:
great