If responsiveness is identified as a major problem in providing excellent customer service, which of...

Detailed Explanation: Providing additional training to customer service staff equips them with the skills needed to address customer inquiries and complaints more efficiently, thereby improving responsiveness. Customer service training can include active listening, effective communication, and quick problem resolution techniques, which enhance the overall customer experience. The BoK emphasizes the importance of developing employee competencies to meet customer expectations and improve service quality.