Wrote sensational reports on a variety of serous problems facing the US. Their works were widely published, and widely read, and they motivated people to make reforms.
As proved by the transatlantic flights of Lindbergh and Earhart, postwar airplanes were engineered to fly greater distance.
A transatlantic flight is the one of an aircraft accross the Atlantic Ocean from Africa, The Middle Easte or Europe to North America, Central America and South America or vice versa.
Charles Lindbergh crossed the Atlantic Ocean and landed safety less than 34 years later in Paris. Thus, he became the first pilot to solo a nonstop transatlantic flight, and as a result he changed public opinion with regard the value of air travel and laid the foundation for the future development of aviation.
Amelia Mary Earhart was the first female aviator to fly solo across the Atlantic Ocean. She became a pioneer.
During the Neolithic revolution, people started settling in river valleys and establishing cities because they developed agriculture. It was of extreme importance for the development of human society because things like states were established and laws and people started developing basic science and things like that. Just look at how Egypt and Mesopotamia developed and how they influenced many other nations that came later.
The answer is B. Partisanship.
Partisanship is basically political bias; a party is in favor of a specific cause/event. Therefore, when elected officials support the policies and programs of their own party, they're engaging in partisanship.