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 use this mouse with my laptop and find that it adds additional freedom of movement that I can now enjoy.
However, I found that the movement sensor stays on even if the mouse is packed away in my carrier case. Far too soon the battery ran out.
I added a miniature on/off switch inside the back of the mouse and now I have extended battery life and enjoy this mouse even more.

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