Answer:
U.S. Bureau of the Census
Step-by-step explanation:
Based on the scenario being described within the question it can be said that the best data source to use would be the U.S. Bureau of the Census. This is the main agency responsible for gathering all types of data about the american people as well as the economy. Therefore all the important and valuable information that you could need regarding where to open your new store can be obtained from this bureau.