Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
Much heavier, tougher material than another ball that I have.  Does not lose air over time.  Just seems more rugged and "professional grade" , like the ones my PT has.  My son loves playing with it!

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