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:
I would have given it a 5 star but the pump that it came with was so cheap that it broke halfway through pumping.  The quality of the exercise ball itself was great.  I actually use this at my desk at work instead of a chair because I read an article that it could help with posture and burning calories.

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