Which country has launched a military communication satellite called Lockheed Martin Advanced Extremely High Frequency (AEHF) satellite?

Option B

The United States Space Force launched a military communication satellite called Lockheed Martin Advanced Extremely High Frequency (AEHF) satellite.
The satellite was launched aboard an Atlas V 551 rocket, from Cape Canaveral in Florida. This is the sixth and final in the Lockheed Martin AEHF constellation. This ultra-secure satellite is launched amid the heavy losses the country is facing due to the coronavirus pandemic.