Explanation
According to ITIL 4, the primary role of a governing body is to evaluate, direct, and monitor the organization's activities, including its service management. One of the key activities of the governing body is to establish and regularly review the goals cascade throughout the organization, which is a mechanism to align the objectives and activities of different levels of the organization with the overall vision and mission. The goals cascade helps to ensure that the organization is delivering value to its stakeholders and customers, and that the service management practices are aligned with the strategic direction and governance framework.
Therefore, the best answer is A. To establish and regularly review the goals cascade throughout the organization. The other options are not the primary role of a governing body, but rather some of the possible activities or responsibilities that the governing body may delegate or oversee. For example, option B. To develop and regularly review IT measures and metrics, may be part of the monitoring activity of the governing body, but it is not the main purpose of its role. Option C. To annually review and approval of IT projects to maximize business value, may be part of the directing activity of the governing body, but it is not the only or the most frequent task that it performs. Option D. To establish and regularly review the effectiveness of risk management and internal controls, may be part of the evaluating activity of the governing body, but it is not the core function of its role. References:
Chapter 9: The SVS: Governance - ITIL 4 Essentials: Your essential ...1 Building governance, risk and compliance with ITIL 4 | Axelos2 Roles and Responsibilities in ITIL and ITSM | ITIL 4 Role Types3

Explanation
Large batch sizes of work are considered a barrier to high performance in Lean and Agile because they increase the amount of work in progress (WIP), which leads to longer cycle times, higher variability, lower quality, and reduced feedback and learning. Large batches also increase the risk of waste, rework, and delays, as well as the complexity and uncertainty of the work. Lean and Agile advocate for reducing batch sizes and limiting WIP, which enables faster flow, shorter feedback loops, higher quality, and more value delivery.
Some of the practices that help reduce batch sizes and limit WIP are:
Pulling versus pushing work, which means that work is initiated only when there is a demand and capacity for it, rather than being assigned or scheduled in advance.
Making work visible, which means that the status and progress of work are transparent and accessible to all stakeholders, using tools such as Kanban boards, burn-down charts, and dashboards.
Limiting work-in-progress, which means that the number of work items in each stage of the workflow is restricted, based on the available resources and throughput, to prevent bottlenecks and overloading.
References:
Integrating ITIL 4 and Design Thinking | Cognixia, section "What is Design Thinking?" Service design: ITIL 4 practice guide | Axelos, section 2.1.1 ITIL 4 , DESIGN THINKING & RAPID - Devoteam, section "Design Thinking" ITIL4 meets design thinking | Axelos, section "Design thinking"