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:
There is a hum on the line when I use this headset for VOIP.  The charge backs under Amazon's new return program don't make it worth returning.  Best advice is just don't buy this one in the first place.

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