According to the author, what is a major cause of spontaneous violence in Americans?

The assertion that the inability to deal with relational, work, or school challenges is a significant cause of spontaneous violence in Americans highlights the emotional and psychological factors that contribute to aggressive behavior. When individuals face persistent stressors in their daily lives, such as conflicts in relationships, job-related pressures, or academic difficulties, they may reach a breaking point where frustration and anger escalate into violent outbursts. This reaction can be exacerbated by a lack of coping mechanisms or support systems to address these challenges effectively, further contributing to the potential for spontaneous violence.

Considering the other options, while financial problems, lack of physical fitness, and overexposure to media violence can influence behavior to some extent, they do not directly address the core emotional and relational struggles that often lead to impulsive aggression. Financial issues may create stress but are not universal in leading to violence, physical fitness generally contributes to overall well-being rather than being a cause of violence, and media violence may desensitize individuals but does not inherently result in spontaneous acts of violence. Instead, the emphasis on relational and contextual challenges provides a more comprehensive understanding of the psychological state that can incite violent behavior.