What items are prohibited in carry-on luggage according to Frontier Airlines policies?

The correct choice identifies specific items that are commonly prohibited in carry-on luggage, aligning with both Frontier Airlines policies and general aviation security regulations. Sharp objects, flammable items, and liquids over 3.4 ounces pose safety and security risks during air travel. Sharp objects can be used as weapons, flammable items can create fire hazards on board, and the restriction on liquids is aimed at preventing potential threats related to the transport of dangerous substances. By enforcing these guidelines, airlines safeguard the well-being of all passengers and crew members, ensuring a secure and safe travel environment.