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 had the MDR-V6s in the early 1990s...loved them but for some dumb reason replaced them with MDR-V600s. I was never happy with the V600s and now 20 years later just replaced them with the MDR-V6. Right out of the box...instant clarity, deep accurate bass, an articulate musical sound. Not sure what the V6 has that makes it so good.

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