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 higher up a food chain that humans eat, the greater the levels of toxic metals they take in.
 Question: Sarah ate a salad for dinner, Sarah's levels of toxic metals have 
 Choices: A)decreased. 
B)increased or
Output:
decreased.