The correct answer is B) No historians have written about the era that preceded the ancient era.
The option that could be a reason why humans know very little about the time before the ancient era is that no historians have written about the era that preceded the ancient era.
We are referring to what is cold prehistory, the time where events occurred before the existence of written records. Historians write what they can research or interpret written records from the past such as the clay tablets of Sumer-Mesopotamia or the Egyptians glyphs due to the Rosetta Stone. But without written records, all is speculation, that is why humans know so little about prehistory.
Zimmerman note, sinking of the Lusitania, General John J. Pershing, and fourteen points were all associated with A. World War I.
Zimmerman note refers to the secret communication between Germany and Mexico, which was intercepted by Britain. Sinking of the Lusitania refers to the event when Germany sank the British ship Lusitania in 1915. General John J. Pershing was an American commander during the WWI. Fourteen points were formed by President Woodrow Wilson about principles for peace.
July revolution is the answer.
