The sentence from the introduction paragraph that serves as the author's thesis is: "<em>Yet key technological developments caused a rapid growth in American urban areas</em>."
A thesis statement is, by definition, the sentence that captures the main idea and your point of view on it on your article.
The sentence that I believe best represents what the author meant to present to the readers is one that briefly explains his view on the topic mentioned in the title, which is the positive effect of technological advancements on a city's growth.
The fairness doctrine was a former US policy that required TV and radio broadcasters to present opposing viewpoints on any controversial topic that was important to the public. The abolition of this rule allowed one-sided networks to gain prominence. Now, nothing controls the amount of time given to opposing viewpoints. Networks can independently control this.
Pretty sure it’s the second answer! :)
