To spread their influence around the world
A. Ninth
The Ninth Amendment was introduced to prevent anyone from assuming that the rights enumerated in the bill of rights were the only protected rights by the Constitution.
D. The Grand canyon's layers get older from bottom to top
The deeper you go, the older the layer
The main argument made in the passage about Timur's empire is about developing farmlands and railroad tracks which contributed in the world war period.
Explanation:
Railroads will be a major advantage in transporting many things to the battlefield, trains could carry things like food, armor, artillery and etc. This gives a huge advantage to one side by get supplied easily without making it a big hassle, they helped contribute to an advantage on one side of a war because it was an easy way to grow food for the soldiers. Farmlands could produce a lot of food especially by keeping away soldiers from starving of food. Farmlands need not to worry about the food in feeding the soldiers