Run-off from fields that have had nitrogen-containing fertilisers applied may cause fish to die in rivers. Which sequence of events explains what happens when fish die because of water pollution by nitrogen-containing fertilisers?
- Aless oxygen dissolved in the water $\rightarrow$ more growth of water plants $\rightarrow$ more plant decomposition by bacteria
- Bless oxygen dissolved in the water $\rightarrow$ more plant decomposition by bacteria $\rightarrow$ less plant growth
- Cmore growth of water plants $\rightarrow$ less plant decomposition by bacteria $\rightarrow$ more oxygen dissolved in the water
- Dmore growth of water plants $\rightarrow$ more plant decomposition by bacteria $\rightarrow$ less oxygen dissolved in the water