Which of the following is a requirement for obtaining a Korean driver's license?

Answer: A — Passing a written examination

Passing a written examination is a fundamental requirement for obtaining a Korean driver's license. This written test assesses the applicant's knowledge of traffic laws, road signs, and safe driving practices essential for operating a vehicle safely on the roads. Understanding these regulations is critical for minimizing accidents and ensuring the safety of all road users. Other options do not reflect the requirements for obtaining a license. For instance, having a sponsor is not necessary in the context of individual driving tests and licensing; applicants must independently meet the legal criteria. Paying a fee without testing would not ensure that applicants are adequately prepared to drive, as it bypasses the essential assessment of their knowledge and skills. Lastly, renewing a previous license applies to those who already hold a license but does not pertain to first-time applicants seeking to obtain a driver's license in Korea.