Comprehensive and Detailed Explanation:

Corporate strategy concerns the organisation's total portfolio and direction; business-level strategy specifies how a business unit competes; functional strategy describes how departments contribute. A plan confined to marketing, even when intended to raise revenue and profit, is functional-level because it coordinates marketing activities and resources. Operational plans subsequently translate that strategy into campaigns, schedules and individual actions. Alignment between these levels prevents departments from pursuing targets inconsistent with organisational objectives. The decision should be evaluated over the relevant planning horizon rather than as an isolated daily task. Management must consider the consequences for workforce capability, process reliability, capacity utilisation and customer expectations. Consistency across corporate, business and functional levels is essential to sustained performance. The appropriate selection is functional level strategy. This follows from the distinction between the concept described and the alternative activities or measures in the answer choices. 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) 32.