Before building a new sports stadium near the waterfront, a city is most likely to establish a municipal department. a redevelopment district. a commission system. a chief executive.

The best answer to the question: Before building a new sports stadium near the waterfront, a city is most likely to establish:___, would be: A redevelopment district.
Explanation:
Most cities have areas in them that have a specific value, be it because of their historical sites, or because they are naturally attractive, like is the case of lands near a waterfront. However, in order to both be able to develop these areas, while at the same time protecting them and ensuring their proper upkeep, cities use something called a redevelopment district, which is a special property tax whose financial gains will be placed into a special fund that will be used exclusively to develop, but also improve and protect the site to be developed. In this case, the sports stadium´s builders will have to do this before they can construct on the desired land.

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.