Trench warfare most likely led to stalemates during world war i by making it
a. difficult to gain an advantage.
b. easy to attack the enemy.
c. difficult for soldiers to fight.
d. easy for soldiers to fight..

A. difficult to gain an advantage

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classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.