The second is the influence of the Gospel writers themselves.

The four gospel writers as theologians in their own right.

He tells more about the birth of Jesus than the other gospel writers.

Doesn't that call into question the accuracy of the gospel writers?

The gospel writer did not misquote the Bible in this matter.

Matthew also introduces the group of twelve later in his narrative than the other gospel writers.

Perhaps the events of Matthew 26:12 are considered by the gospel writer to be sufficient anointment.

Mark's Greek is more primitive than the other Gospel writers.

Secondly, because the cycle is three years long, only three of the Gospel writers are given a year.

He concludes that the gospel writers took the two traditions and weaved them together.