to kick the field goal.
When BYU was faced with the 4th and 1 at the 48, I would have punted and forced their offense to drive 70 yards. If they knew that it was 4 down territory, then run all 3 plays. It's easier to get a yard on the ground in most cases - even against uu's awesome defense.
There were mistakes made and BYU luckily made it out undefeated. The coaching staff learned from these mistakes. But, it is nice to have opponents unsure what BYU is going to do.