Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
Does exactly as it is supposed to and was great for my son during rehabilitation of leg in water.  He was able to work out his leg, as instructed by doctors w/ this belt.

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