Question

Theodore Roosevelt the twenty-sixth president of the United States was the youngest president to ever hold office.

Which revision of the sentence is now properly punctuated?

Theodore Roosevelt, the twenty-sixth president of the United States, was the youngest president to ever hold office.
Theodore Roosevelt the twenty-sixth president (of the United States) was the youngest president to ever hold office.
Theodore Roosevelt the twenty—sixth president of the United States—was the youngest president to ever hold office.
Theodore Roosevelt, the twenty-sixth president of the United States was the youngest president to ever hold office.

Answer 1

A.)Theodore Roosevelt, the twenty-sixth president of the United States, was the youngest president to ever hold office.

or maybe D but prolly A ;)

Step-by-step explanation:

Answer 2

The first one is correctly punctuated.

We use commas to mark non-defining clauses. Such clauses often add extra, non-essential information about the noun or noun phrase. "The twenty-sixth president of the United States" is non-essential information so we add the commas.