Communications Satellites Are Usually Placed in Geosynchronous Orbits,a Distance of 4.43

Multiple Choice

Communications satellites are usually placed in geosynchronous orbits,a distance of 4.43 $\times$ 10⁷ m from the center of Earth.What is the time lag for a signal sent from one point on Earth's surface to another via such a satellite? (The radius of Earth R_E = 6.370 $\times$ 10⁶ m.)

A) 0.13 s
B) 0.25 s
C) 0.51 s
D) 0.29 s
E) 0.15 s