Faced with problems associated with the law of diminishing returns, world-empires characteristically ________ in order to feed and provide for their populations
A) colonized nearby lands
B) imported slave labor
C) regularly invented new technologies
D) promoted import substitution
E) established trade relations with countries having comparative advantages
Answer: A
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Although Greenland's ice cap is melting, the melting is projected to have no effect on world sea level
a. True b. False Indicate whether the statement is true or false
Whether a glacier is advancing, retreating, or in a state of equilibrium, the ice forming the glacier continues to move downslope
Indicate whether the statement is true or false
Most of the population of sub-Saharan Africa relies on ________ as their main energy source
A) coal B) hydropower C) wood D) dung E) animals
Judge the following sentence according to the criteria given below: Most marine organisms are affected by the high pressure at depth BECAUSE they do not have large internal air pockets that can be compressed
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.