Which essential urban need was met by this structure

Explanation:

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Through this building, people in roman empire able to obtain water from the resources that located outside of their empire and provide necessary nutrients for their crop to grow. The clean water was also used to support various other Roman economic sector, such as gardens, mining, blacksmith, animal husbandry, etc.

Explanation:

i think that the correct answer is

c. p equals 5,000 times, 0.3, to the power of the fraction m over 20