Hihi!
One thing that would effect global warming would be all of the above! This is because global warming is actually projected to have a number of effects on the oceans and environments. The ongoing effects do include rising sea levels due to thermal expansion along with the melting of glaciers and ice sheets, and warming of the ocean surface, leading to increased temperature stratification. If you cannot choose all of the above I would choose B. Falling sea levels because that is the obvious main cause.
I hope I helped!
-Jailbaitasmr
