challenge: What is the primary objective of the Assault Amphibious Battalion (AABN) during amphibious operations?
  
  A. To provide air support and conduct aerial combat operations
  B. To land the surface assault element of the landing force and their equipment in a single lift from assault shipping
  C. To conduct reconnaissance and gather intelligence on enemy positions
  D. To establish a defensive perimeter and secure the beachhead
  Answer: 