[Solved] Croup A)is caused by Staphylococcus aureus. B)is a life-threatening condition requiring urgent intubation. C)occurs predominantly in children under 4 years of age. D)is infection and inflammation of the epiglottis. E)all of the above. Naked Horizontal Restraint: An antitrust term referring to an agreement between competitors at the same level of the market structure to limit competition among themselves, such as price fixing or market division. Rule Of Reason: A doctrine used in antitrust law to determine if a business practice is reasonable and therefore legal, focusing on its effect on competition. Per Se Rule: A legal doctrine declaring that certain actions are inherently illegal and do not require detailed proof of harm or anti-competitive effect to establish their illegality. Monopoly Power: Monopoly power refers to the ability of a single company or entity to control a significant portion of the market for a particular good or service, limiting competition and potentially influencing prices or terms of sale.