Which of the following disqualifies a person from owning a firearm in Hawaii?

The correct answer is D, All of the above. In Hawaii, being under 21 years of age for handguns disqualifies a person from owning a firearm as you must be at least 21 years old to own a handgun. Additionally, having a felony conviction and not being a U.S. citizen are both factors that disqualify individuals from owning firearms in Hawaii. These disqualifications are in place to ensure the safety and well-being of the community by preventing individuals who may pose a higher risk from owning firearms.