Coral reefs reduce the amount of carbon dioxide in the oceans. People have destroyed many natural coral reefs through pollution. They have also created a number of artificial reefs. How has the presence of artificial reefs affected ocean systems?
A
It has helped slow the increase in carbon dioxide in the oceans.

B
It has added to the increase in carbon dioxide in the oceans.

C
It has stopped the increase in carbon dioxide in the oceans.

D
It has caused the disappearance of carbon dioxide in the oceans.