Task: Sentiment_Analysis
Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
I had intermittent connection problem at first when the transmitter unit was sitting level on a power strip. However, as soon as I plugged the transmitter vertically to the wall, the connection became stable. I figure this is due to when the unit is mounted vertically, the radio wave covers most of the floor. However, if it sits level, then the radio wave actually goes into the ceiling and the floor. After all, many antennas out there are directional!

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