The best way for an IT steering committee to monitor the adoption of a new enterprise IT strategy is to establish key performance indicators (KPIs), because they are metrics that measure the progress and achievement of the IT strategic objectives and goals, and provide feedback and guidance for improvement. KPIs can help the IT steering committee to track and evaluate the performance and outcomes of the IT function, and to ensure that the IT activities and resources are aligned with the business needs and expectations12. KPIs can also help to communicate and report the IT value delivery and innovation to the board and other stakeholders12. References := ISACA, CGEIT Review Manual, 7th Edition, 2019, page
43-44.

Quantitative risk assessment is more objective than qualitative risk assessment because it uses numeric values and calculations to estimate the likelihood and impact of risks. Quantitative risk assessment is more appropriate when the risk assessment needs to be unbiased and consistent. Reference:= ISACA, CGEIT Review Manual, 7th Edition, 2019, p. 90-91.

Enterprise architecture (EA) is the process of aligning business and IT strategies, processes, and resources to achieve organizational goals and objectives1. EA implementation involves a significant amount of change in the enterprise, such as introducing new technologies, standards, policies, roles, and responsibilities2. Therefore, managing the challenge of change is MOST important to the successful implementation of EA, as it requires effective communication, stakeholder engagement, change management, and governance mechanisms34. Without managing the challenge of change, EA implementation may face resistance, confusion, conflict, or failure. References := Entreprise Architecture: Critical Factors and Implementation | IEEE ...5 A Review of Critical Success Factors of Enterprise Architecture ...3 Critical Success Factors of Enterprise Architecture Implementation - IJOCIT1 EVALUATION OF ENTERPRISE ARCHITECTURE IMPLEMENTATION: A CRITICAL ...4

The BEST method for the IT strategy committee to evaluate how well the IT department supports the business strategy is to use IT balanced scorecard reporting. An IT balanced scorecard (BSC) is a strategic management tool that translates the IT vision and mission into measurable objectives, indicators, targets, and initiatives across four perspectives: financial, customer, internal process, and learning and growth1. An IT balanced scorecard reporting is a process of collecting, analyzing, and communicating the performance data and results of the IT department based on the IT BSC framework2. An IT balanced scorecard reporting can help to:
Align the IT objectives and activities with the business strategy and expectations3 Monitor and evaluate the efficiency, effectiveness, and value of the IT department Identify the strengths, weaknesses, opportunities, and threats of the IT department Communicate and demonstrate the contribution and impact of the IT department to the business outcomes Therefore, an IT balanced scorecard reporting is the most suitable method for the IT strategy committee to assess how well the IT department supports the business strategy.
The other options are not as good as option C. While it is useful to conduct a capability maturity assessment, a customer survey analysis, or an IT controls assurance program, these are not comprehensive enough to evaluate how well the IT department supports the business strategy. They are rather focused on specific aspects of the IT department, such as its processes, services, or controls. They do not necessarily cover all four perspectives of the IT BSC framework, which provide a holistic view of the IT performance and alignment with the business strategy. Reference:= The IT Balanced Scorecard (BSC) Explained - BMC Software1 What Is a Balanced Scorecard (BSC), How Is it Used in Business?2 How to Align Your Business Strategy with Your Technology Strategy ...3 How to Measure Your Strategic Plan's Success - dummies SWOT Analysis: What It Is and When to Use It - Business News Daily How to Communicate Strategy Effectively - ClearPoint Strategy