The statement that gives the most accurate comparison is:
c. The Western Front was stagnant, but had many offensives. The Eastern Front had fewer offensives, but the front shifted considerably during each one.
This statement accurately reflects the characteristics of both fronts during World War I. The Western Front was primarily characterized by trench warfare and resulted in a stalemate with many offensives that did not lead to significant territorial changes. In contrast, the Eastern Front experienced more fluid movements and shifting lines, with fewer major offensives, but much higher mobility compared to the Western Front.