Final answer:
The Stage 2 implementation for 'meaningful use' criteria includes advanced decision-support and population health, which is part of the broader initiative to increase efficiency in healthcare delivery.
Step-by-step explanation:
The correct option representing Stage 2 for implementing 'meaningful use' criteria as part of the Affordable Care Act (ACA) is a. Advanced decision-support and population health. Stage 2 of meaningful use focuses on advanced clinical processes which include more rigorous health information exchange, increased requirements for e-prescribing and incorporating lab results, and electronic transmission of patient care summaries across multiple settings.
Moreover, meaningful use Stage 2 requires advanced clinical decision support and the ability to engage in population health management. These steps are vital in ensuring the meaningful use of electronic health records (EHRs), which are part of the broader initiative established by ARRA and expanded upon in the ACA to increase the efficiency of health care delivery while also addressing healthcare costs.