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:
I bought this KLH subwoofer a couple of days ago ... . I hooked it up to my computer to go along with my existing 5 piece surround sound system. This speaker rattles the walls! (Literally! ) I love it! It's every bit (if not better) than my friend's subwoofer made by Boston  Accoustics (which costs A LOT more). Buy this and your ears will be happy.  VERY rich quality bass!

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