Synthetic Fertilizers Greatly Increase Crop Yields

Synthetic fertilizers greatly increase crop yields. However, excessive applications of nitrogen fertilizers can cause which of these problems?

A) Inhibition of the natural microbial decay processes traps natural organic matter in the soil.
B) Increased nutrient runoff leads to the eutrophication of aquatic environments.
C) Decreased soil acidity harms the bacteria that naturally fix nitrogen into a usable form.
D) All of these are correct.