Two Satellites Are Monitored as They Orbit the Earth;satellite X

Multiple Choice

Two satellites are monitored as they orbit the Earth;satellite X is four times as far from the Earth's center as is satellite Y.From Kepler's third law one may conclude that the period of revolution of X is what factor times that of Y?

A) 1/2
B) 2.0
C) 8.0
D) 22.6