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 bought this lens a few months ago and it has easy become my main walkaround lens. The aperture on it is low enough that you can do some low-light shots without a tripod. I've actually dropped it quite a lot and bumped into much with it, but it's strong enough to take it. Even with the beating that I've put it through it remains like it was the day I got it. The only real problem I've had with it is that on really humid days, it tends to stick while sliding it in or out.

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