Comprehensive and Detailed Explanation:

Structural operations decisions concern substantial physical configuration choices such as capacity, facility location, process technology and supply-network design. These choices are capital intensive and difficult to reverse. Infrastructural decisions cover enabling systems, including quality management, performance measurement and human-resource policies. New-product development is commonly governed through managerial processes and cross-functional coordination. The structural decisions in the list are capacity and supply network, both of which shape the organisation's operating footprint. Strategic priorities should be expressed as measurable objectives and reflected in functional plans. The important test is whether the decision strengthens a capability valued by customers and can be maintained within available resources. Poor alignment between market position and operating systems creates unnecessary cost or disappointing service. The required selections are capacity and supply network. These choices address the particular category named in the question, whereas the remaining alternatives describe other activities, dimensions or outcomes. Such prioritisation should be revisited when customer expectations, technology, costs or competitive conditions materially change.

Study Guide Reference: CIPS L5M9 – Critically assess the objectives and strategies of operations management; the uploaded question bank cites study-guide page(s) 35.