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've already sharpened all my knives and my scissors with great success!  It's easy and safe to use, too.  My only question is that the package has an illustration of sharpening a serrated knife.  My serrated knives do not have a straight edge so I don't think I can use it on those.

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