It would probably be the last one, agriculture because agriculture refers to actually growing crops while the other words dont directly relate to that.
I believe the correct answer is C
Answer: Some of the effects are:
To improve the economic stability of a country.
Increase in exports.
Increase in GNP.
Foreign affairs will lead to betterment.
There will occur Happiness and Prosperity.
Explanation:
D- immigrants flocked to the US for greater opportunities and a better life
