The one-child policy had people pay special fees as punishment for having more than one-child. This led to a large number of hidden undocumented children that were hidden to avoid breaking the law. This mostly occurred in rural areas and was a big problem for the government.
Answer:
<h2>QUEEN ELIZABETH </h2>
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It's located in Africa. Northeastern Africa.
They crossed over a "land bridge" between the countries. The ice froze all the water so they were able to walk across it.
They were hindered by economic development and lack of enforcement, so I'd say 1. Cost, because no one would pay for it.
