Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
Can't say enough good stuff about Smartwool socks.  I live in them all winter long.  The difficulty is finding the right heft.  I find the "hiking medium" to be good for day-to-day winter activities in Seattle.

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