A town is located far from the mountains and draws its water from a river. Where is the best place to test and monitor the quality of water a city will use? a) Sewer pipes in the middle of the city

b) At the source of the river glacier

c)Downstream of the city's treatment plant

d)Upstream of the city's wastewater treatment plant

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

There is no map, maybe give the link, it may be b

There are no put the options so we can assist you ! put it on then i'll answer it ! did you not put the options on intentionally by any chance?