A) The available land outside of the city is privately owned, whereas there is an adequate site within the city that is city-owned.
This statement supports the argument to build the plant inside the city since the city already owns some land inside the city.
INCORRECT(B) Regardless of the site location, most of the jobs created by the plant’s construction will go to residents of the city.
The authors main argument is that the jobs will go to the residents if the plant is constructed inside the city. The above statements weakens author argument by saying irrespective of its location, the jobs will go to the residents.
(C) A municipal plant like the water treatment plant will pay no taxes to city government regardless of its location.
The author argues that the construction of plant inside the city would provide more economic benefits in the form of
jobs. The plant paying taxes to the city doesn't affect the authors argument that the plant will bring more jobs.
INCORRECT(D) Most citizens of the city will tolerate brief disruptions in their daily lives if such disruptions will secure better water quality in the future.
This is unrelated to the argument. The author did not talk about the citizen's toleration to the construction of new plant.
INCORRECT(E) The amount of taxes paid by workers depends both on where they work and where they live.
The author talks only about the economic benefits in the form of jobs. This sentence does imply economic benefits to the city but they are not in the form of jobs as author argued.
INCORRECTHence
option B