Some people hold to a conspiracy theory that the Flavian emperors and or their scribes, especially Josephus, may have written the gospels, as a form of pro-Roman propaganda. ( Think about. "Render unto Caesar." ) There is really no evidence for this, so that it is no better than any other conspiracy theory, but having said that there is no evidence for any of the other theories about the gospels origins either, and the supporters of it can make an amusingly good case. So that you can amuse yourself speculating about it for a while, just as long as you don't take it seriously, as with all the other unsupported theories. Speculating can be fun, but the real truth is , and the proper answer is, nobody has any idea, the books origins are truly lost in the mist.

PS. What does "d" mean ?