What significant change was introduced by the New Zealand Public Health and Disability Act 2000?

The New Zealand Public Health and Disability Act 2000 introduced the establishment of District Health Boards (DHBs), which was a significant reform in the country's health system. The primary purpose of creating DHBs was to ensure a more localized and efficient delivery of health services. These boards were designed to be responsible for the planning and purchasing of health services on behalf of their communities, allowing for a better alignment of health needs with the services provided.

The establishment of DHBs aimed to improve access to health care, enhance the quality of services, and ensure that health care delivery was tailored to meet the specific needs of local populations. This organizational structure was a move towards a more decentralized health system, aiming to empower local governance and increase community involvement in health care decision-making.

The other options do not reflect the primary achievements affecting the public health landscape established by the Act; thus, B stands out as the correct response in understanding the outcomes of the New Zealand Public Health and Disability Act 2000.