[Solved] Sometimes it is not possible to separate subjects from experimental and control groups and the result is that they may discuss the research.What is the threat that this situation poses? A) causal time order B) experimental mortality C) diffusion or imitation of treatments D) statistical regression Self-Esteem: Refers to an individual's subjective evaluation of their own worth or value. Using Pornography: The engagement with sexually explicit materials such as videos, magazines, or websites, often discussed in the context of its psychological and relational effects. Landmarks: Physical features or objects in the environment that serve as reference points for navigation or understanding a location. Hobbies and Interests: Activities that individuals engage in for pleasure, relaxation, or personal satisfaction during their spare time.