[Solved] Which of the following is NOT one of the ways that control is achieved in research studies? A)control groups. B)holding certain variables constant. C)systematically varying selected variables. D)quasi-experimental design Erotic Movie: A genre of film that focuses on representing human sexuality in a manner intended to provoke erotic arousal in its audience. Pain Sensitivity: The degree to which an individual feels pain, influenced by biological, psychological, and environmental factors. Blood Pressure: The pressure of circulating blood against the walls of blood vessels, an essential indicator of cardiovascular health. Neural Activity: The electrical and chemical processes that occur within the nervous system, enabling thoughts, emotions, and behaviors.