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:
We bought a set of these and have never been able to get them to work. We follow the directions, we have been online and have done web searches to find others who have solved the issue, but like many people we have talked to, we have never got them to work. We are NOT alone. These bottles are a great idea but a waste of time and money. We should have sent them back but we kept trying to get them to work. Now we are stuck with them.

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