by making only small changes by changing only a few specific ocean basins by causing changes to occur at very slow rates by causing paired changes with equal and opposite effects
I gave my students this multiple choice question: Some scientists theorize plate motion could alter the level of water in Earth's seas. How would the nature of plate motion limit the possible changes in sea level?

Only one answer is correct among these 4 choices:
- by making only small changes
- by changing only a few specific ocean basins
- by causing changes to occur at very slow rates
- by causing paired changes with equal and opposite effects

Could you tell me which one is correct?

by causing changes to occur at very slow rates