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

Input:
Very easy to use. Such an inexpensive tool for what it does. I didn't realize how dull my knives really were until I sharpened them with this. Definitely worth the purchase.

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