I want to know the answer to the following question:
Who amended the account at a later date?
All the background I'm provided with is that "Modern biblical scholarship treats the account in the synoptic gospels as a literary creation by the author of the Mark Gospel, amended in the Luke and Matthew accounts, intended to heighten the importance of what they saw as a theologically significant event, and not intended to be taken literally.". Is that enough to answer the question?