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:
This product leaked and had to be sent back.  I liked the weight and size but I couldn't get it to stop leaking.  I did not ask for an exchange, I just decided to return it.

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