GDP is significant because it provides information on the size and performance of an economy. The real GDP growth rate is frequently used as a gauge of the economy's overall health. An increase in real GDP is viewed as an indication that the economy is performing well in general.
I believe the answer is: C. unoccupied lands.
<span>The act was aimed to give the government more land for economic purposes (such as place for settlements or acquiring it resources).
This act lead to the mass migration of native Americans to western territories of the united states</span><span />
Most canyons were formed by a process of long-time erosion from a plateau or table-land level. The cliffs form because harder rock strata that are resistant to erosion and weathering remain exposed on the valley walls.
However, the Song dynasty was difficult to conquer because of the strategic location of Xiangyang, which became a vital position for Kublai to capture and hold. The city guarded the waterways of South China because the Han River was a major tributary into the Yangtze River.
