Which organization is primarily tasked with implementing the NSTP?

The correct choice reflects the role of the Commission on Higher Education (CHED) in implementing the National Service Training Program (NSTP). CHED is specifically mandated to oversee and ensure that the NSTP is integrated into higher educational institutions across the Philippines. This organization is responsible for the formulation and implementation of policies, plans, and programs that enhance the quality of education, including the NSTP.

While other organizations mentioned in the options play important roles in the educational and vocational sectors, they do not hold the primary responsibility for the implementation of the NSTP. The Department of Education focuses more on the elementary and secondary education levels, TESDA is primarily concerned with technical education and skills development, and DOLE is centered around labor and employment issues. Thus, CHED's direct involvement in the higher education landscape positions it as the key authority for NSTP implementation.