What is the age requirement for owning a handgun in Hawaii?

In Hawaii, the minimum age requirement for owning a handgun is 21 years old. This age limit is in accordance with the Hawaii Revised Statutes which states that individuals must be at least 21 years old to possess a handgun. Option A is incorrect because it is the minimum age requirement in most states, but not in Hawaii. Similarly, option C is incorrect because it is the minimum age requirement for purchasing a handgun from a licensed dealer in Hawaii, not for owning one. Option D is incorrect because owning a handgun requires some level of responsibility and maturity, and thus there is an age requirement in Hawaii.