Question 16 (2 points)
What dramatically began to increase the population of the United States over time?
A. Higher birth rates of US citizens
B. Growth of slavery in the south to meet the increased demand for cotton
C. The acquiring of more land with large Native American populations
D. Increased immigration to the United States of immigrants in search of freedom,
opportunity, and jobs

America's abundant resources have been long time attractions for many wanderers and settlers.
Till the late 19th century, immigration to America was easy and had no specific norms. Hence people from different parts of the world migrated easily and in huge numbers in search of freedom, employment opportunities, and several other reasons.
With advances in technology and communications people starting coming here to live a life of their dreams.
Another factor contributing to an increase in population was the growth of slavery. With the boom of the textile industry in Great Britain for which slaves served as fuels.
Transformation of cotton to the United States made it's land fertile in Deep South from Georgia to Texas thereby increasing its value and asking for more number of slaves led to an adding point in an increase of its population.