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:
Worked exactly as advertised. Tried a small area on my day pack and happy to report that it dried without color change. I was willing to allow some darkening but it did not happen.

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