Question: Identify which of the following sentences has correct subject-verb agreement. Multiple choice question. Mr. Gates, who were once considered the richest person in the world, founded and led one of the world's largest software companies. Mr. Gates, who have the reputation of founding and leading one of the world's largest software companies, later focused on philanthropy. Mr. Gates, who was once considered the richest person in the world, founded and led one of the world's largest software companies.