Which capability area includes practice areas that focus on managing and delivering customer solutions?

The capability area focusing on managing and delivering customer solutions is indeed Delivering and Managing Services. This area encompasses various practice domains that emphasize the end-to-end process of service delivery, ensuring that services meet customer needs and expectations. It includes best practices for service management, aligning capabilities with customer requirements, and maintaining a focus on quality and efficiency in delivery.

In the context of this capability area, organizations develop and refine strategies to ensure that they can effectively respond to customer demands, manage service requests, and continually enhance the value delivered to customers. By concentrating on the complete service lifecycle, this area helps organizations enhance their responsiveness and adaptability within the competitive landscape.

Other options, while relevant to certain aspects of project management and service creation, do not specifically target the comprehensive focus on managing and delivering customer solutions as strongly as the chosen capability area does. Therefore, it is the most suitable answer for indicating where the emphasis on customer solution management resides.