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:
They do not work, I plugged them into my ps/2 ports on MB and plugged in my USB mouse and keyboard and neither of them worked.

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