E3A01 - Amateur Extra Class

E3A01 : What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by EME?
A 2,000 miles, if the moon is at perigee
B 2,000 miles, if the moon is at apogee
C 5,000 miles, if the moon is at perigee
D 12,000 miles, if the moon is visible by both stations
Correct Answer: 12,000 miles, if the moon is visible by both stations