Profiting companies were worth investing in
they enforced the rules and for punishment was death
The correct answer should be C. Korean war
That is because the result was as if the war never happened. Borders were returned to how they were before the war. This is similar to Korean war where the Northerners started pushing south and then it reversed and in the end it returned to how it was.
America welcomes the most imagrants due to all the work, freedom and other basic options you could think of