Respuesta :
Answer:
A. They are large and so they have a lot of gravity
Explanation:
The moons are formed from the ingredients that are left over from their parent planet or can also be formed as asteroids that are captured by planets with a stronger gravitational force. Since the giant planets have a large mass, they had enough material to be they will form the moons and by having a much greater gravitational attraction they manage to capture a large number of asteroids.