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:
Physician recommended to treat shoulder rotator cuff injury.  I have been using for about a month, and am pleased with the exercises and the product.  It's easy to understand, the components are interchangeable in a logical way and appear to be sturdy and durable.  Comes with photocopied exercise options, which are also available online.  Have recommended to friends.

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