Which of the following can contaminate an aquifer? A. All of these
B. landfills
C. agricultural regions
D. Animal feces
E. gas stations

landfills, agricultural regions, and gas stations can contaminate an aquifer.Aquifer:

The aquifer is a layer of liquid rock beneath the earth. Underground water is contaminated by excavation and quarrying, increased fertilizer use, and septic tank leakage. However, the construction of France does not contaminate subsurface water.

Applied in various fields, ground-level structures with steps due to water storage are in rural places, it's used to store water.As a result, landfills, agricultural areas, and petrol stations contaminate an aquifer.

Therefore, the correct choices are "Option B, Option C, and Option E".

Findout more about the contamination here:

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Ur e n d is not real

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na