Answer: (i) Software Engineering Institute Capability Maturity Model

SEI CMM stands for Software Engineering Institute – Capability Maturity Model — a framework developed by the SEI (Carnegie Mellon University) for assessing and improving an organization's software process maturity through five levels:

1. Initial — ad hoc/chaotic process,
2. Repeatable — basic project management, repeatable practices,
3. Defined — documented/standardized processes,
4. Managed — processes measured and controlled quantitatively,
5. Optimizing — continuous process improvement.

Why the others are wrong:

• (ii), (iii), (iv) — all contain incorrect words ("Evaluation Institute", "Initiative", "Management Model"); the correct expansion is Software Engineering Institute – Capability Maturity Model — option (i).