Performing revisions to existing program code is an example of:Adebugging.Bstructured programming.Cprogram maintenance.Dwalk through.SUBMIT

Break Down the Problem

1. Identify the context of the options given.
2. Determine the correct definition related to revisions in programming.

Relevant Concepts

3. Review definitions of debugging, structured programming, program maintenance, and walk through.

Analysis and Detail

4. Debugging: The process of finding and fixing bugs or errors in the code.
5. Structured programming: A programming paradigm that emphasizes a logical structure to improve the clarity and efficiency of the code.
6. Program maintenance: The process of modifying a program to correct faults, improve performance, or adapt to a changed environment.
7. Walk through: A review process that involves manually going through the code to ensure its correctness or to understand its flow.

Verify and Summarize

8. The problem concerns revising existing program code, which directly relates to 'program maintenance'.

Final Answer

C. program maintenance.