Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I bought these headphones because there were so many positive reviews on Amazon. Well, here's another 5 star review to add to the list. They sound really good, and they're comfortable and light. The bass is surprisingly rich. The Panasonic RP-HT21 headphones are perfectly designed for the casual listener who wants a quality product without spending a lot of money.

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