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:
A must for in-car use. With my Garmin 60CSx plugged into the Lighter Adapter, it keeps the backlight on and the entire unit is much easier to read and use while driving.

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