Answer:
A. The cost of nuclear fuel is very low
Explanation:
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The Sumerians are the earliest know inventors of The Wheel.
Answer:
C is the Indus Valley and D is China
Answer:
65 years and over
Explanation:
People 65 years and over represented a smaller proportion of the total population in 2000 than in 1990.
Trade barriers restrict or reduce international trade which reduces international cooperation among states and the overall interdependence. For example, if you rely on another country to buy cocoa and they rely on you to get sugar, if you enact trade barriers, you won't get cocoa and they won't get sugar which will be a huge problem for both industries in both countries because you depend on each other.
