You will be given a definition of a task first, then some input of the task.
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).

Paragraph: The upper rock layers are much younger.
 Question: Rich was examining a cliff face. Which part of the cliff is younger, geologically speaking? 
 Choices: A)the base 
B)the top
Output:
the top