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'm running an OS10X Dual Core iMAC at home.  Just plugged the modem in and it worked, nothing to change.  Works great.  Great deal.

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