What is the main idea of American dream?? Please help

The main idea of the American Dream is that in the United States each person, regardless of their origin, condition or characteristics, can achieve their goals and prosper economically and socially. This based on the main ideals of the nation, which are freedom and equality, which allow anyone who wants to start a life in search of happiness to achieve that goal more easily than in other parts of the world. Thus, through the American Dream is described the situation through which millions of immigrants who have come to this nation have passed, and have prospered economically, developed benefits for society and provided a better future for their families.

sorry i do not know this

the answer is option a.