The answer is Aaron Douglas
Answer:
The concept of the "suburbs" was built up by Levitt and Sons, and this concept had become extremely successful, as over 85% of new homes within the United States are in suburban areas- and is has become a staple of American culture.
..Well, you might want to cut out the "staple of American culture" part. That's just me talking out my butt.
Answer:
the printing press
Explanation:
The printing press made maps and books more affordable and readily available in Europe.
The printing press using movable type was innovated by Johannes Gutenberg in 1440 made books and maps cheaper to produce and also helped people share knowledge quickly and reach a wider audience.
In addition, it encouraged more people to write and share their knowledge.
the answer would be B.) secretary.