[Solved] Trace the increasing American interventionism and expansionism leading up to and following the Spanish-American War. Research Assistant: A person who supports academic or professional research efforts, typically conducting experiments, data collection, or analysis. Self-reported Arousal: A subjective measure of one's own emotional and physiological state of alertness, excitement, or activation, often collected via questionnaires or interviews. Sexually Explicit: Content that graphically depicts sexual acts or nudity, intended to stimulate erotic rather than aesthetic or emotional feelings. Bar Graph: A visual representation of data in which bars are used to compare different categories or variables.