The answer is C.
As a science website says, "Scientists think they know why the Ancestral Puebloans disappeared. The primary culprit, studies suggest, was a megadrought that would have made it impossible to grow enough food to feed the tens of thousands of people living in the region."
If you didn't know, drought represents the lack of rain.
In the election of 1800, Jefferson and Burr tied.
The main issue is that second place got VP, instead of a ticket running together. So, a President would not have the choice of VP.
Farmers of the late 19th century did not benefit from the "McKinley Tariff," since this only made certain foreign goods more expensive by placing a general tax on their import.
increased urbanization which led to expansion
The correct answer would be C.
In the 15th and 16th centuries, an increased number of vogages occurred all around the globe, to longer distances each time. This allowed the western civilization to stablish contact with the rest of Africa, America and Oceania.
The ability to travel further distances came because 2 things: the development of better ships, such as the galleon, and the advancements in navigation technology, which allowed the ship to reach it's destination even in months-long journeys across the ocean. The astrolable was one of such technological advances, allowing the sailors to identify the position of a celestial body in the sky, and triangulate the position of the ship from that information.
