The fourth alternative is the most correct (D).
The world was definitely not the same after the invention of the internet. This type of technology allowed the connection between the markets and enabled instant information.
In the case of political campaigns, the internet has become a source of information for voters and has become a direct and immediate communication tool between voters and candidates.
The Answer is Rocky Mountains
I would think really hot as the boarder between mexico and the U.S. get really hot and thats why those terrains are known to be deserts.