Respuesta :
Small businesses are the reason America has a strong economy.
A substantiated opinion is one that is verified, proven and confirmed.
Based on this description, the substantiated opinion given in this speech is that "small enterprises are responsible for almost all the economic growth in the United States."
This opinion is substantiated because it is not based on the President's personal opinion, but on facts. Many small enterprises have grown and became some of the most important companies that support America's economy. An example of this is Apple, a company that was started by two young students in a garage and is now one of the most important companies worldwide.