By the 1940s, the general interest, mass circulation magazines (with and without an emphasis on pictures) were well established. These include Life, Look, Collier’s<span>, and the </span>Saturday Evening Post<span> and others. National magazines, with circulations in the millions, were an important part of national advertising strategies of virtually all major brand name products. In 1946 magazines held 12.6 percent of the total advertising market share (van Zuilen, 1977).</span>
Explanation:
Because it was the first big group of people who had one leader, always lived in a concrete place. Also they invented lots of new things that was more complex than those things who were invented before
I think it might be c but idk
The third one. She opened one of the first schools for African American girls.
Very overcrowded Rio de Janeiro. Also to encourage development in the interior.
