In a mob situation, those who express feelings and take action are likely to be:

In a mob situation, individuals who express feelings and take action play a significant role in shaping the dynamics of the group. Leaders of the mob often emerge as they articulate the collective emotions and motivations of the crowd, rallying others around a common cause. Their ability to influence the feelings and actions of others can be incredibly persuasive, especially in high-stress environments.

Moreover, influencers among the crowd, who may not necessarily be formally recognized as leaders, also contribute significantly to group behavior. These individuals might sway opinions or inspire action through their enthusiasm or vocal support, effectively mobilizing others without holding a leadership title.

Considering both leaders and influencers contribute to the dynamics of the mob, it becomes clear that those who express emotions and take action can belong to either category. Thus, the inclusion of both aspects culminates in a comprehensive understanding of the group dynamics, which justifies the selection of all encompassing options. This reasoning aligns with the understanding that emotions and actions within a mob are interconnected and pivotal in determining the mob's direction.