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:
My Sony shelf system high-fi CD player was skipping all over the place when I played one.  With one run of this marvelous product, it did no more.  I have used it on all my CD and DVD drive, and it's miraculous.

Thanks for such a great product. I've tried others and they can't compare at all.

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