Read the following context and choose the best option to answer the question.
Context: So I ' m sure you ' ve all seen the various " register to vote ! " posts on your respective friends pages . And yes , I agree that you should . However , I also want to remind everyone that is registered to vote that you should double - check this , especially if you have n't voted recently .
Question: What may be a good reason to double - check if you 're registered to vote ?
Options: 
A. If you 've voted recently , you 'll have to register to vote again .
B. You might not be registered depending on the circumstances .
C. You might already be registered depending on the circumstances .
D. None of the above choices .


B