What does the WHO advocate for in terms of health workforce?

The correct answer highlights the World Health Organization's (WHO) commitment to strengthening health systems globally through a well-trained health workforce. The WHO advocates for the training of health professionals to ensure that there is a sufficient and competent workforce capable of meeting the health needs of populations. This encompasses not only enhancing the skills and knowledge of health workers but also advising governments and organizations on effective labor policies that influence how health systems operate.

By focusing on training and labor policies, the WHO seeks to ensure that health services are delivered efficiently, effectively, and equitably. This approach is essential in addressing public health challenges and achieving broader health outcomes, demonstrating the organization's recognition of the integral role that a robust health workforce plays in the overall effectiveness of health systems worldwide.

The other options reflect strategies that do not align with WHO's mission of promoting health for all and improving global health standards.