Instruction: Determine the sentiment expressed by the user in her review from the provided choices, and respond by selecting one of the available options.

Input:
I bought this for home use after knee surgery.  Great quality product and I find I am stretching much more than I did before - exactly like the one my physical therapist uses.

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