Exam OG0-092 topic 1 question 2 discussion

Scenario: Global Mobile 1 -
Global Mobile is a mobile telecommunications company formed through a series of mergers and acquisitions. They are yet to fully integrate the customer service systems for the most recent acquisitions, and as result, customer service has been a major concern for the Chief Technology Officer.
Results for the last two quarters have shown that Average Revenue Per User (ARPU) and the customer retention (Churn) rate have fallen below the industry average. The Corporate Marketing group has published some new findings about customer satisfaction. The customers appear to be switching to Air Light, a competitor, because of superior customer service. Global Mobile actually has better coverage in nearly all markets than Air Light, and good roaming agreements that keep rates low for business travelers. But, customer satisfaction has remained low.
The Business Strategy group and the Enterprise Architecture group have conducted a high-level project to develop the enterprise-wide strategic plan. They have developed a business scenario which contains a good conceptual model of what needs to be done, and also identifies the key requirements. This was used in preparing the proposal presented to the Executive Council and the Corporate Board.
The planning for the program has been underway for several months. Global Mobile has selected TOGAF 9 as the basis for its Enterprise Architecture.
The Corporate Board has approved funding for a multi-million Euro conversion to transition to a packaged Customer Service System. It is anticipated that the overall program will take five years to complete, but there are some tactical projects that can commence immediately to address the situation. The Corporate
Board has placed one additional major constraint on the program. In addition to achieving the business outcomes directly related to improving overall customer service within each business unit, the Corporate Board expects the Target Architecture to produce an additional saving of at least 30% over current operating costs through energy efficiency initiatives, virtualization of servers and workstations, and expanded telecommuting and desk-sharing. This Green initiative is intended to become a model for future investments at all company facilities worldwide.
You have been engaged as a consultant to advise the Chief Architect on the best ways to approach to the implementation planning activities for this significant business transformation.
Based on TOGAF 9, which of the following is the best answer? (Is this the right answers to choose?)