You are given a short paragraph, a question and two choices to answer from. Choose the correct answer based on the paragraph and write the answer(not the key).

Example input: Paragraph: Many of the worlds people live with water scarcity, and that percentage will increase as populations increase and climate changes.
 Question: John's town used to have lots of water, back when there were only a few hundred people. However, now that the town holds several thousand people, the water availability is 
 Choices: A)scarce 
B)plentiful
Example output: scarce
Example explanation: Based on the information given in the paragraph, population growth will make water more scarce, so that is the correct answer.
Q: Paragraph: Older rocks are at the bottom and younger rocks are at the top.
 Question: Tom conducted an archaeological dig and compared some of the rocks he found. He noticed that the rocks at 2 feet deep were _____ than the rocks at 20 feet deep. 
 Choices: A)older 
B)younger
A:
younger