Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
Works like one, looks like one.... it's a pump. I wouldn't recommend it if you have back pain but it works perfectly well for what I need. That said, it doesn't work on my stroller which would have been great.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: B: positive