Answer :
Final answer:
Explanation of the correctly punctuated sentence in the given options.
Explanation:
The sentence punctuated correctly is:
- The deepest place in the ocean is about 7 miles down the Mariana trench in the Pacific Ocean.
In this sentence, the commas are appropriately used to set off the non-essential information 'in the Pacific Ocean.'
Learn more about Punctuation in English sentences here:
https://brainly.com/question/36650842