What was not a major influence upon the middle ages? feudalism comitatus norman invasion classes

It would be "Norman Invasion" that was not a major influence upon the Middle Ages, since this had to do with the invasion of England, which was largely separated from continental Europe. 

If your answers look like this a) expansion through conquestb) development of a calendar c) development of a written language d) creation of a large road workthen the answer is dhope it