Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I recently ordered this to replace my primary work mouse. As I'm using a computer 10+ hours a day, I thought it would probably behoove me to take some preventative measures against an RSI.

I love this thing! Easy to get used to, no wrist movement, and with a small add-in application I've got a fully active "scroll wheel". From what I've heard (and what I've looked up), you won't find a cheaper and more well built trackball.

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