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 am a teacher and I use these bands for an after school fitness club for middle school students. They are very durable and the students love them. The only problem I have with them is the material that connects the handle to the band is rough on the edges. After about a half an hour of use your thumbs can get pretty irritated by the friction if you do not keep adjusting the grip.

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