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: Something with less hydrogen ions would have what pH value? 
 Option1: high 
 Option2: low 
 Explanation: With a higher the concentration of hydrogen ions, a solution is more acidic and has a lower pH.

A: high
****
Q: Question: John was weighing some materials in his science lab. He observed that as objects had greater density, the heaviness of the objects 
 Option1: Increased 
 Option2: Decreased 
 Explanation: A given volume of a denser substance is heavier than the same volume of a less dense substance.

A: Increased
****
Q: Question: Dan has relatively high blood volume, which means that within his blood vessels, there is pressure that is relatively 
 Option1: lesser 
 Option2: greater 
 Explanation: This is because the lower blood volume in the vessels exerts less pressure on the vessel walls.

A:
greater
****