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:
These headphones, after few months, the rigth side, will stop to work...had 3, all stopped to work, same side, don't ask me why...a pity, cause produce a great sound.....

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