Given the task definition and input, reply with output. 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: In erosion, the higher the elevation, the farther the stream is from where it will reach base level and the more cutting it has to do.
Question: When water is eroding down a river it will do more cutting if it is
Choices: A)low
B)high
high