increase in the salt content of existing coastal wetlands increase in the number of organisms in existing reefs decrease in the number of tides each day decrease in the depth of the ocean floor
I gave my students this multiple choice question: After the last ice age, the melting of the polar and mountain ice caps caused the water levels of the oceans to rise. Which most likely resulted from the rising of ocean water levels?

Only one answer is correct among these 4 choices:
- increase in the salt content of existing coastal wetlands
- increase in the number of organisms in existing reefs
- decrease in the number of tides each day
- decrease in the depth of the ocean floor

Could you tell me which one is correct?

increase in the salt content of existing coastal wetlands