Final answer:
A customer checking a firearm must fill out a firearm registration form. This ensures that firearms are legally transferred and registered to the rightful owner. Additional regulations require firearms to be safely secured when not in use. Option C is correct.
Step-by-step explanation:
When a customer is checking a firearm, they must fill out a firearm registration form. This form is usually provided by a federal or state authority and is necessary to maintain records and ensure lawful ownership and transfer of firearms.
The form typically includes details about the buyer, the seller, and the specific firearm being transferred. According to certain laws, gun owners are also required to keep their firearms unloaded and secured with a trigger lock or similar device under specific circumstances, except when the firearm is being used at a place of business or for legal recreational activities.
Obtaining a license, especially for handguns, may involve various other legal requirements such as police issuance of one-year licenses.