Answer:
a) the total aircraft weight is less than 55 lbs without fuel/battery.
Step-by-step explanation:
United States of America has some regulations regarding drone flying. sUAS or small Unmanned Aerial System is generally used for recreational and hobbyist usage, or flying for fun. That drone needs to achieve certain rules like to be registered with the FAA, or to be flown within visual line-of-sight. Also, community-based safety guidelines must be followed, and drone must be under 55lbs (or 25kg).