What did it take to convince Lt. Col. James E. Jones that using Navajo codes would work? CHOSE ALL THAT APPLY. PLEASE HELP! GIVE 10 PTS


1. An experiment proved the speed and accuracy of Navajo codes was better than the code that was commonly used by the Marines' Signal Corps.



2. The security of the Navajo code was intensely examined and analyzed by cryptography experts who failed to break it.



3. Lt. Col. Jones had known Navajo Philip Johnston for many years, and trusted his recommendations.



4. The Navajo language was simple, and it would be easy for English-speaking Marines to learn and use.