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

Input:
Purchased this video cleaner and cannot load into one of my DVD players;  receive disc error message: playback on this disc is not available.  Really not sure what this means, but won't function on this player.  Does function on other
DVD recorder/player????

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