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:
These things are lifesavers when you're riding motorcycles in the cold.  When your toes or fingers go numb, they aren't going to warm up until you stop.  With these in your gloves or shoes, you got a source of heat to keep you going.

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