Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I have purchased two of these routers and both have failed.  One lasted 13 months and the other 7 months.  They refused to stand behind either unit because I did not have the receipt but I had everything else.  Don't waist your time and money with this one.

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