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:
Worked precisely 1 month. Now you can just keep pumping and pumping but there's no pressure building up which means no oil coming out. Sad. I wanted to love this. I recommend you try something different but this is a waste of money

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