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 bought four of these things. The first set worked pretty well, so I bought a second set to use with my other computer but the second set never worked. They would keep losing the connection once they were paired. Spent about 3 hours with tech support, but she couldn't figure it out either.

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