[Solved] Which of the following is a problem in evaluating the agreement between observers in behavioral studies? A)The observers are usually not trained. B)The behaviors being studied are usually not directly observable. C)There will always be some agreement by chance. D)There is no method for evaluating the agreement between observers. United States: A country located in North America, composed of 50 states, known for its significant influence on global culture, economy, and politics. Employed: The state of having a job or career, especially where one works for an employer as opposed to being self-employed. Eusocial: Describing a complex social structure in certain animal species, where there is cooperation in caring for the young, division of labor, and overlap of generations within a colony. Heterocephalus Glaber: Also known as the naked mole-rat, a rodent known for its resistance to cancer and its ability to live in low-oxygen environments.