The search for an object that was causing Uranus to move in unexplained directions led to the discovery of Pluto. Which of the following most likely explains why a dwarf planet could cause Uranus to move in unexplained directions?

Responses
A A dwarf planet would keep Uranus from drifting away.A dwarf planet would keep Uranus from drifting away.
B Uranus has no atmosphere to change its direction.Uranus has no atmosphere to change its direction.
C Uranus has moons.Uranus has moons.
D A dwarf planet could move Uranus with its gravi

D A dwarf planet could move Uranus with its gravitational pull.