A
An orbit with an altitude strictly below 500 kilometers above Earth's surface
B
An orbit around Earth with an orbital period matching Earth's rotation on its axis
C
A polar orbit that passes directly over both geographical poles during every single rotation
D
An elliptical orbit that intersects the Moon's gravitational sphere of influence
Correct answer: (b) An orbit around Earth with an orbital period matching Earth's rotation on its axis
Explanation
A geosynchronous orbit is defined as an orbit around Earth where the satellite's orbital period matches Earth's rotation on its axis. The other options incorrectly describe other types of orbits.