Answer :
Final answer:
To participate in New Jersey's muzzleloader season for deer, hunters must complete a safety course and have a specific license or permit; it's not limited to those under 18 years old.
Explanation:
To participate in the New Jersey muzzleloader season for harvesting deer, a hunter is required to complete a safety course (a). It is not sufficient to use any firearm available (b), as a specific type of firearm, namely a muzzleloader, is required for this hunting season. Additionally, contrary to (c), a specific license or permit is indeed required to hunt with a muzzleloader during the designated season. Furthermore, the requirement is not related to the age of the hunter, as stated in (d), since muzzleloader hunting is not restricted to those under the age of 18.