Concept:The Mariana Trench is the deepest known ocean trench on Earth, formed where two oceanic plates converge.
Explanation:The Mariana Trench lies on the floor of the western North Pacific Ocean, east and south of the Mariana Islands.
It was first measured in 1875 during the Challenger Expedition.
This trench formed due to the collision of two oceanic plates, which created a very deep depression.
The Indian Ocean's deepest point is the Sunda Trench.
The Atlantic Ocean's deepest point is the Puerto Rico Trench.
The deepest part of the Black Sea is south of Yalta, Crimea.
So, among all given options, only the Pacific Ocean contains the Mariana Trench.
Answer:C. Pacific Ocean