Which statement defines the integrated product support element, sustaining engineering?

A) Those technical tasks (engineering and logistics investigations and analyses) to ensure continued operation and maintenance of a system with managed risk.

B) The permanent and semi-permanent real property assets required to support a system.

C) The management actions, procedures, and techniques necessary to acquire, catalog, receive and store supplies

D) The process to develop, implement and manage the maintenance concept, requirements, and procedures for a system.

E) The management actions, procedures, and techniques necessary to acquire, catalog, receive, store, transfer, issue and dispose of spares, repair parts, and supplies