Alicia 负责管理向美国 IT 决策者销售安全软件的推广活动。设置推广活动定向条件时，她应采取哪些步骤？请选择所有合适选项。

Alicia is targeting IT decision-makers in the US for security software. Therefore, selecting the United States as the location is crucial to reach the correct geographic audience. Choosing specific relevant skills ensures that the audience has the technical background pertinent to security software. Selecting "decision-maker" as a job function directly targets individuals with purchasing authority. Finally, excluding job seniority levels that are not decision-makers refines the audience further, preventing ad spend on individuals without the power to influence or make purchasing decisions. These combined steps create a highly targeted audience, maximizing campaign efficiency.