What defines a portion of work included in a contract for items being purchased or acquired?

A.
Procurement management plan

B.
Evaluation Criteria

C.
Work Break Structure (WBS)

D.
Contract Statement of Work (SOW)

Explanation:
Contract Statement of Work (SOW)

Design: Details what is required in terms of physical characteristics.

Performance:Specifies measurable capabilities the end product must achieve in terms of operational characteristics.

Functional: Defines what the deliverable is required to do but not necessarily how to do it. This allows the prospective sellers to offer different possible solutions for archiving the same end-use function.