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:
Awesome product. Anyone looking to use DMSO should definitely do the research before you purchase the product, but trust when I say it's the best kept secret out there.

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