The best and most correct answer among the choices provided by the question is the third choice "fertile land supported a food surplus."
Probably the primary result of Chinese civilizations settling<span> in the </span>river valleys<span> was that they were able to produce more crop.</span>
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Answer is D All answers are correct
1- X-Ray Telescope
2- Optical Telescope
3- Radio Telescope
<span>4- Gamma Ray Telescope
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