The answer in C the Great Wall of China
Emperor Montezuma (There were multiple with the same title) Ruled the Aztecs.
The kingdom went into decline from the mid-16th century CE when the Portuguese, put off by the interference of Kongo's regulations on trade, moved their interests further south to the region of Ndongo. The latter kingdom had already defeated a Kongo army in 1556 CE.
WW1 had left the German economy in shambles because of the reparations they had to pay. The sudden surge in demand for supplies made thousands of jobs for the unemployed and boosted the GDP.
