To answer this question, you need to understand the difference between an inspection and a walkthrough.
Option A) Both inspections and walkthroughs are led by the author - This option is incorrect because in a walkthrough, the author is present, but in an inspection, the author is not present.
Option B) An inspection is led by a moderator and a walkthrough is led by the author - This option is the correct answer. In an inspection, a trained moderator leads the process and facilitates the review, while in a walkthrough, the author of the work being reviewed leads the process.
Option C) Both inspections and walkthroughs are led by a trained moderator - This option is incorrect because a walkthrough is led by the author, not a moderator.
Option D) A walkthrough is led by the author. The author is not present during inspections - This option is incorrect because the author is present during a walkthrough, but not during an inspection.
The correct answer is B. An inspection is led by a moderator, and a walkthrough is led by the author.