Paul Describes How Hunger Is a World-Wide Problem,and Then Explains

Paul describes how hunger is a world-wide problem,and then explains that there is a hunger problem in America.Finally,he describes a family suffering in his hometown.The principle of supporting material organization that Paul employs here is the

A) primacy-recency principle.
B) complexity principle.
C) "soft" to "hard" evidence principle.
D) specificity principle.