Writing comments in source code:

Comments are stripped by the compiler/interpreter during preprocessing and do not appear in the compiled executable (.exe), so they don't affect file size, compilation time significantly, or runtime performance. Writing comments is a fundamental software engineering best practice as it improves code readability, maintainability, and helps other developers (and future you) understand the logic and intent behind the code.

Step-by-step Derivation:
Analysis of each option:

• Option A: False. Comments are removed during compilation; they don't appear in the final .exe.
• Option B: True. Comments enhance code clarity and documentation—a core best practice in software engineering.
• Option C: False. Comment parsing adds negligible compilation time compared to actual code compilation.
• Option D: False. Comments are completely removed before execution, so they have zero runtime overhead.
  Conclusion: The correct answer is B.