How does the author unfold ideas in paragraphs 2 to 4?

A.
by stating the goals, explaining how the task was completed, and describing how it's being assessed
B.
by stating the issues, describing the problem in detail, and explaining the overall solution
C.
by introducing the problem, describing a solution, and explaining the result of the solution
D.
by introducing the goals, explaining how they were met, and offering ways to prevent further issues