How did the one-child policy result in large numbers of undocumented chinese ?

After their first child, many mothers hid any other children they had, thereby causing them to be undocumented.

Explanation: took the test ;)

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )

because he didn't know how to do it