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.
Yes, the answer to this would be the third option. One of the causes of the rise of the conservative movements in the 1970s is the shifts in the demographics to the suburbs and Sunbelt. Conservative movements are actually rooted from American history. Hope this helps.
Government regulation plays a role in business in protecting consumers, preventing actions taken by businesses that will hurt the overall economy, and also in regulating the financial industries sector to prevent major economic turmoil. Periods of unregulated economic activity have been mired by large booms and busts, so governments have attempted to intervene to regulate economies in order to prevent these damaging cycles to economies.