Final answer:
The sections "Fear in the Air" and "Hitler’s Vicious Lies" mainly focus on the impact of Hitler's propaganda and fearmongering, which contributed to his rise in power and the spread of Nazi influence.
Step-by-step explanation:
The primary focus of the sections "Fear in the Air" and "Hitler’s Vicious Lies" is to discuss C) The impact of Hitler's propaganda and the spread of fear. In these sections, the author describes how Adolf Hitler utilized propaganda to sway the public opinion, stirred up fears, and laid the groundwork for the expansion of Nazi influence. Through captivating oratory skills and systematic propaganda, Hitler exacerbated anti-Semitic sentiments, attacked political adversaries, and propagated his racial ideologies. This manipulation and control over the masses facilitated his military agendas leading to World War II.