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 was using it for a couple of months however it is no longer recognized in the BIOS. I tried using it in another machine but I got a message saying in/out problem.
I am frustrated with this hard disk.

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