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

Input:
I bought these for my son for his birthday. He was very happy. Thank you. Now if I can just get him to hand them over when I want to sock something responsibly :)

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