Which examples does Obama provide to support his claim that "our immigration system is broken”? Check all that apply. It is much harder for immigrants to enter the country today than it was in the past.
Some businesses hire undocumented workers and pay them less.
Most people around the world no longer want to immigrate to America.
Undocumented workers worry about losing their families if they come forward.
Some people are breaking the law and are not being punished for it.

The hole in the system is that while you can set any legislation you may, wealthy businesses will continue to ship immigrants in by the busload to do cheap labor. And with the financial power they have behind them, there is not much our justice system can do. Only if legislature were to put into effect a set of laws to limit the powers of wealth in some way, would you close that hole in our immigration laws.

Explanation:

christopher columbus (1492–1504)

i'd assume india mainly because of how isolated japan was.   plus it is a whole china away.