The correct options are Assurance case, Documented business case, and Defined product scope and boundaries.

The Documented business case is required because it records the justification for the purchase and links the acquisition to business needs and expected benefits. It provides decision makers with the rationale, the objectives that the software must meet, and the high level risk and return considerations that support approval.

The Defined product scope and boundaries item is required because it sets what the product must do and what it will not cover. Clear scope and boundaries prevent scope creep and help assess fit with existing systems and responsibilities. They also make it possible to identify integration, data flow, and security responsibilities before procurement.

The Assurance case is required because it states the security and assurance claims for the product and the evidence that will be provided to support those claims. An assurance case lets approvers understand what level of confidence they can place in the product and what artifacts or testing will be available to demonstrate that confidence.

The Estimated total lifecycle cost is not the specific element asked for in a short written need to acquire declaration. Cost estimates are often produced as part of broader procurement planning but the declaration itself focuses on justification, scope, and assurance rather than a full lifecycle cost breakdown.

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