Answer:
B). WHEN THE AIRCRAFT WEIGHS LESS THAN 0.55 POUNDS ON TAKEOFF, INCLUDING EVERYTHING THAT IS ON-BOARD OR ATTACHED TO THE AIRCRAFT
Step-by-step explanation:
All small UAS need to be registered regardless of the weight of the aircraft before, during, or after the flight. When the aircraft has a takeoff weight that is more than 0.55 pounds, but less than 55 pounds, not including fuel and necessary attachments, an unmanned aircraft would not have to be registered before it is operated in the United States