[Solved] Which of the following is a similarity between Chan Chan, Tula, and Cahokia? A) All three were built on major river systems. B) All three were built near a sea coast. C) All three were the hubs of major regional trading networks. D) All three had populations in excess of 50,000 people. Extradyadic Sex: Sexual activity that occurs outside of a committed relationship, often considered a breach of exclusivity. Erotic Plasticity: The degree to which an individual's sex drive and sexual interests can change based on various social, environmental, and situational factors. Cheating: The act of being dishonest, deceitful, or breaking rules to gain an unfair advantage. Jealous: Feeling or showing suspicion of someone's achievements or advantages, or fear of losing affection or position to a rival.