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

Input:
BluBlockers are the best sunglasses I have ever owned.  BluBlockers are unique.  They enhance your vision by blocking the blue spectrum of light.  They cause everything to have a golden glow that is hard to describe.  Everything looks brighter and more detailed with BluBlocker sunglasses while most other sunglasses simply make everything look dark.  Don't let the low price of these sunglasses fool you.  BluBlockers are built to last.

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