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:
Installed per instructions and it is working great.  You MUST follow the instructons to achieve successful results.  Product review receives five stars.

Update:  We moved into a new house three years later and it STILL works great.  Caller ID still good and also works with our fax machine.  Thanks GE!

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