The answer to your question is d
<span>trading city on the Niger River where Africans traded gold, salt, cloth, books, slaves, shells, & metals</span>
Between the 1870s and 1900, Africa faced European imperialist aggression, diplomatic pressures, military invasions, and eventual conquest and colonization. At the same time, African societies put up various forms of resistance against the attempt to colonize their countries and impose foreign domination. By the early twentieth century, however, much of Africa, except Ethiopia and Liberia, had been colonized by European powers.
The European imperialist push into Africa was motivated by three main factors, economic, political, and social. It developed in the nineteenth century following the collapse of the profitability of the slave trade, its abolition and suppression, as well as the expansion of the European capitalist Industrial Revolution. The imperatives of capitalist industrialization—including the demand for assured sources of raw materials, the search for guaranteed markets and profitable investment outlets—spurred the European scramble and the partition and eventual conquest of Africa. Thus the primary motivation for European intrusion was economic.
Paranoia refers to a feeling that can exist in humans and which is heavily influenced by anxiety or by fear. People who suffer from this often feel themselves to be persecuted, or hated and threatened by everyone. These people might also believe in conspiracies, which can result in irrational fear.
During the 1920s, the country experienced a period of paranoia. The trauma of World War I was fresh in people's minds, and many were fearful of ever being threatened in such a way again. This led to a strong fear of the "other." This was expressed in practices such as increased racism (ex. the rise of the Ku Klux Klan) or political intolerance (ex. the Red Scare against communists). This was also expressed through isolationism, as many people believed that by keeping the country free of foreign influence, they would be less threatened by dangerous foreign forces, such as communism.
