Answer:
I would say B
Explanation:
Many people use social media, so with a bit of targeting, one can easily reach a large number of their intended audience.
Answer:
Senatorial courtesy is a long-standing unwritten, unofficial, and nonbinding constitutional convention in the United States describing the tendency of U.S. senators to support a Senate colleague when opposing the appointment to federal office of a nominee from that Senator's state.
Explanation:
From what I know ethnocentrism means someone who thinks their culture is higher than another therefore I would go with A.
Better transport so you could see their better, machines were doing jobs so you could hang more, gave you something to talk about (new inventions)