Final answer:
The author of the document is Herodotus, a Greek historian who completed The Histories in 440 BCE. The document discusses the Egyptians' discovery of the solar year and their influence on Greek culture and religion. The correct option is c.
Step-by-step explanation:
The author of the document mentioned in the question is Herodotus. Herodotus was a Greek historian who completed his work, The Histories, in 440 BCE. In this document, Herodotus discusses the Egyptians being the first to discover the solar year and divide it into twelve parts. He also mentions that the Egyptians were the first to use the names of the twelve gods, which the Greeks adopted from them.
The question does not specifically mention when the document was written, but it can be inferred that it was written by Herodotus himself during the events he describes, as he traveled and read sources to gather information for his work.
Hence, Option c is correct.