In cities, the area in which rainwater can seep into the ground is reduced. Water flows over roads, then the runoff is carried out to sea through drainage systems. How does the runoff from cities affect ocean systems?
A. Ocean systems are damaged with the loss of sediments.
B. Ocean systems are improved by receiving more water.
C. Ocean systems are improved by the addition of nutrients.
D. Ocean systems are damaged with more pollutants.
