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:
Book was just what I wanted for a refresher on Nitrox Diving.

There are some errors in the book but the publisher quickly emailed me the errata.

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