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:
already starting to crack a little bit at the inflation hole after a few months of use.  I thought these were built to be slammed, but it does not seem to be the case.

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