Question

The collection of computer instructions and other files that constitute a piece of software is

Answer 1

The answer would be
A. Codebase

Answer 2

Answer:

A. codebase

Explanation:

A a codebase (or code base) is a collection of computer instructions known as source code written in one or more programming languages used to build a particular software system, application, or software component.

A codebase from a business perspective represents an asset could easily run into millions of lines of code representing person centuries of effort.

Also, IT staff that have been with the organization for a while  tend to develop a knowledge of the code base, and this enables them to make improvements and fix bugs and add enhancements easily.