How did ground personnel first learn that Flight 11 had been hijacked? a) The terrorists contacted them to make demands. b)Foreign voices were overheard in the cockpit. C) Flight attendants phoned ground personnel and relayed information. d) A passenger on board Flight 11 contacted a family member.

c) Flight attendants phoned ground personnel and relayed information.<br /><br />On September 11, 2001, ground personnel first learned that Flight 11 had been hijacked when flight attendants phoned the airline's ground personnel and relayed information about the situation. This was one of the first indications that the plane had been hijacked and was being used as a weapon.