The discipline of identifying the components of a continually evolving
system for the purposes of controlling changes to those components and
maintaining integrity and traceability throughout the life cycle is called:

A.
Configuration management

B.
Request control

C.
Change control

D.
Release control

Explanation:
This is demonstrated in Configuration management of computer-based
systems, British Standards Institution, 1984.
The other answers are components of the maintenance activity of software life cycle models.
In general, one can look at the maintenance phase as the progression
from request control, to change control, to release control.
*Answer request control is involved with the users requests for changes to the
softwarE.
*Change controlinvolves the analysis and understanding
of the existing code, and the design of changes, and corresponding
test procedures.
*Answer release control involves deciding
which requests are to be implemented in the new release, performing
the changes and conducting testing.