Final answer:
Option (2), The correct sentence structure for using a semicolon to join two independent clauses would look like 'Elvis Presley was known as the King of Rock; [second independent clause].'
Step-by-step explanation:
The sentence that properly uses a semicolon to join two independent clauses is the one where the semicolon is placed between two complete thoughts that are closely related in meaning but could stand alone as separate sentences. This is in line with the guidance that semicolons should be used to connect independent clauses that are not joined by a coordinating conjunction and to avoid the use of commas for this purpose.
Therefore, the correct sentence structure would be 'Elvis Presley was known as the King of Rock; another independent clause with related meaning would follow here.' Without the second independent clause provided in the options, we cannot complete the sentence with a semicolon.