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:
This bike rack works great.  I've had it for about a month and take my bike to the park several times a week.  The initial assembly was a bit difficult, but after that, you can just leave it on your trunk even when you don't have your bike on it, and you can still open the trunk when the bike's not on.  Why get something more expensive?  This works.

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