The spread of television ownership to most American households
Between the 1940s and 2000s, commercial television had a profound and wide-ranging impact on American society and culture. It influenced the way that people think about such important social issues as race, gender, and class It played an important role in the political process, particularly in shaping national election campaigns.
I would say B. Eustress because this stress is a "good" type of stress that aided you in performing well. Eustress is stress that is "good," and helps you.