instruction:
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.
question:
Question: If Mona is exploring and aquifer and she dives deeper down into it, what happens to the levels of fossil water she encounters?
Option1: they increase
Option2: they decrease
Explanation: Deeper aquifers typically contain older 'fossil water.'
answer:
they increase

question:
Question: Mike weighs 90 pounds and Tom weighs 200 pounds. Who likely experiences less friction on the Earth?
Option1: Mike
Option2: Tom
Explanation: Heavier objects press together with greater force, and this causes greater friction between them.
answer:
Mike

question:
Question: If Bob stops exercising, his heart muscle should become
Option1: stronger
Option2: weaker
Explanation: When a person exercises regularly, and is fit, the heart undergoes certain long-term adaptations. The heart muscle gets stronger, and expels more blood with each contraction.
answer:
weaker