Morale among troops had a significant impact on the battle's outcome, making the correct answer Low morale caused significant issues.

During the Battle of the Bulge, many soldiers faced extreme conditions, including harsh winter weather and the psychological toll of intense combat. Initially, the surprise of the German offensive and the resulting confusion contributed to low morale among some troops. This low morale led to issues such as decreased motivation, difficulties in communication, and challenges in executing orders effectively. However, as the battle progressed, efforts by leaders to bolster troop spirits and rally support helped improve morale, contributing to the eventual success of the Allied counteroffensive. Overall, the fluctuating morale of troops played a crucial role in determining the battle's dynamics and outcome.