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

Input:
I have both the red and yellow bar but mostly use the yellow bar as part of tennis elbow recovery. I also use it against a wall for back/shoulder pain(rolling against wall)

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