What is a joint-stock corporation? A.) a company owned by a large corporation that doesn't share
B.) a company with a CEO who gets all the profits
C.) a company whose joint effort is to stock shelves
D.) a company owned by private investors where all shared part of the profit
E.) a personal business with only one shareholder

During the era of european expansion, what was the biggest reason for spain’s push for exploration?

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?