Final answer:
Designing a comprehensive developmental guidance program is the correct management activity, as it entails strategic planning and organization in an educational setting.
Step-by-step explanation:
The management activity among the options provided is D. Designing a comprehensive developmental guidance program. Management activities in education typically involve planning, organizing, leading, and controlling the resources and processes within an educational context to achieve specific goals. This includes developing curricula, implementing policies, and overseeing programs. Delivering a classroom guidance program, coordinating individual planning, and offering responsive services are more directly related to service delivery rather than the overarching management functions. Designing a comprehensive developmental guidance program requires strategic planning and organization, which are core management tasks. It includes identifying goals, strategies, and resources for promoting students' development and success.