Write the next sentence in the following story.

How to register a gun
Look up your state's gun laws online before purchasing a gun.
Depending on the state you live in, gun registration may or not be necessary. Visit your state's website to get information about its particular gun regulations.

OPT:
A). If registration is required, read up on the specific requirements for the application process in the section of the website dealing with licensing and regulatory affairs. Hawaii and the district of columbia, for instance, require registration for all guns.
B). From there, you can ask questions about when and where to register a gun. Some states consider registering a gun to be a " self-defense, " so to speak.
C). Each state's gun laws vary slightly, but typically you can find these information online on the appropriate websites. If you're not sure, consult a lawyer or check with your local attorney.
D). You may also want to check if the gun laws you're looking into require you to own either a gun or another person's gun. If this is the case, your state will send you a registration form to have you fill out.. The answer should be
A).