The biggest reason was the existence of the European Alliances. Countries were pulled in due to alliances with other countries The alliance system was a primary reason why many European countries were pulled into conflict. Germany, for example, was obligated by a treaty to support Austria-Hungary.
C bc the other lines are higher
A) An increase in supporter morale
That would be the answer.
The mamluk horses had horse shoes
D was the romans way of thinking in the matter and thus the anwser
