Moving at the same velocity to the East which means that they are both on the same planet in space.
Relative to the center of the Earth, a person on the North Pole is moving at the same velocity to the East because both are present on the same planet in space.
The whole planet of earth spins in the same direction as well as with the same velocity so we can conclude that option A is the correct statement about direction and velocity of the earth.
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C. a solid foundation
from conservation of momentum
And from Conservation of Energy