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:
I use the fan on a temporary basis, to stick in the window of my work shop/3 car garage.  On really hot days, I can refresh the air in less than 15 minutes.  Once adjusted for size, it's really easy to set the fan in the window and get things circulating.  The on/off switch works well, but does seem a little cheap. So far, it hasn't been an issue.

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