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: Dan is swimming into shallower water. The water the shallower he goes will be
Option1: younger
Option2: older
Explanation: Deeper aquifers typically contain older 'fossil water.'
[A]: younger

[Q]: Question: John was looking at rocks in the valley and noticed something. The less resistant the rocks he looked at were, the amount they remained was
Option1: Shorter
Option2: Longer
Explanation: Different types of rocks weather at different rates. More resistant types of rocks will remain longer.
[A]: Shorter

[Q]: Question: Carla is pushing two carts down a street. One cart is heavy, the other is light. The heavy cart, compared to the light one, will accelerate
Option1: slowly
Option2: quickly
Explanation: The greater the mass of an object, the less it will accelerate when a given force is applied.
[A]:
slowly