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: Water flowing over a steeper slope moves faster and causes more erosion.
 Question: Kelly built a home with a gorgeous ocean view, but the hillside is prone to erosion, and each time it rains, his foundation becomes less stable. The slope is getting steeper and the water is flowing _____ causing more erosion. 
 Choices: A)faster 
B)slower
faster