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:
This is a must have. This is included with the S10 or S20 when bought outside the US. If you buy the camera in the US, buy this immediately. As with most digital cameras, either Canon eats batteries rapidly.
Unit quickly recharges, typically less than 2 hours.
It's a bit expensive, but really necessary.
Has attachment to have camera directly plugged into wall so you can download pictures to your computer. This is absolutely necessary if you transfer via serial connection.

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