Answer:
Its D) In the middle of an ocean, where two plates move toward each
other.
Step-by-step explanation:
For more detailed explanation.
A continental shelf extends from the coastline of a continent to a drop-off point called the shelf break. From the break, the shelf descends toward the deep ocean floor in what is called the continental slope. Even though they are underwater, continental shelves are part of the continent
Hope it helps.^-^