Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
These headphones are great. I use them at work nearly every single day. The noise cancelling that they provide is very good and the quality of the audio is great as well. I initially rated these at 4 stars (since I prefer to underrate rather than overrate) but I cannot think of a single negative for these headphones.

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