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:
Last year I bought a window fan from a local home improvement store, which I put in my bedroom window to help cool my room down at night so that I can sleep.  It worked wonderfully, but within a month (probably sooner) it developed a problem:  It began to rattle and make very annoying noises.  So I bought the Holmes Twin Window Fan.  I've had it in my window for about two months now, and it has yet to make any annoying noises.  I definitely recommend it.

The ONLY reason why I gave it four stars and not five was because the knob that turns on the right-hand fan doesn't work the way it should.  I have to turn it over a half turn before it will click on; and the same thing when I shut that fan off, over a half-turn rotation before it will click off.  As inconveniences go, this one is relatively minor, so I think I can live with it.

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