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:
This is one exercise tool that is useful for yoga, strength training, and pilates. There are a number of routines for the exercise ball available online.

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