Since we must select all that apply and the question says that we must also select 4, there is only one false answer in the question. And that is: "help from England".
England did not help the USA to be more developed. In fact, England was probably not even interested in seeing the former colony to become so powerful and rich.
On the other hand, business people were interested in seeing that happening. The numerous rivers did help with trade and transport of raw materials for constructions, so did Iron and Oil deposits and immigration made sure that there was a lot of labor available.
The correct answers are:
New England business people
Numerous rivers
Iron and oil deposits
Immigrants
