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

Input:
This is the first pair of in-ear headphones I have used, but I find them truly outstanding.  They provide fantastic acoustic response while at the same time immersing the listener into the music by blocking out 99% of ambient noise.  I highly recommend all IPOD listeners to take your music appreciation to the next level by making the small investment into these headphones.

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