D. level of the water table
hope its helps
<span>"too much water can cause raging floods and flush pollutants and soil into rivers and streams"
</span>the statement i got the answer from
Spores in the air or contamination through some sort of insect interaction. In an open system, there are billions of microbial agents floating around. With an open container containing a food source and time, the likelihood of contamination is nearly %100.