What is the name of the Change Enablement life cycle Phase which supports Phase 4. What needs to be done?

The COBIT 5 implementation life cycle has seven phases, which are supported by three continuous and interwoven change enablement workstreams. Phase 4 of the implementation life cycle is "What needs to be done?", where the program is planned in detail. This phase is directly supported by the change enablement activity of "Identify role players and establish buy-in". This ensures that the right people are involved and committed before the implementation plan is executed, which is critical for the program's success.

B. 'Define target state' is a key activity within Phase 3 of the implementation life cycle, "Where do we want to be?".
C. 'Plan program' is the name of the implementation life cycle Phase 4 itself, not the supporting change enablement activity.
D. 'Define problems and opportunities' is a key activity within Phase 2 of the implementation life cycle, "Where are we now?".

ISACA, COBIT 5 Implementation, 2012, Page 26, Figure 6, "The Implementation Life Cycle".

ISACA, COBIT 5 Implementation, 2012, Page 40, Section 4.4, "Phase 4—What Needs to Be Done?".