Answer:
Many historians agree that a major factor contributing to the Germans' defeat in the Battle of the Bulge was their lack of fuel.
Step-by-step explanation:
1- lowercase 'h' in historians
2- capital 'g' in Germans'
3- capital 'b' in Battle
4- capital 'b' in Bulge
5- lowercase 'f' in fuel
Historians and fuel are both just regular nouns, so they should be lowercase. Germans, Battle, and Bulge are all names or parts of names, so they should be capitalized.