Where is the youngest crust of the Earth found?
At the spreading centers in the middle of the
oceans.
In places where one plate is falling beneath
another.
At the edges by the continents

At the spreading centers in the middle of the oceans.

Explanation:

According to research, the youngest crust of the Earth can be found near the seafloor spread in the centers or mid-ocean ridges. So it can’t be at the edges by the continents or in places where one plate is falling beneath another.

Ibelieve the answer is c also i'm in k12 too