How did the way the war was fought differ on eastern and western fronts

The Western front was best characterized by trench warfare. The armies dug into the ground, both sides constructing elaborate trench networks. This caused them to reach a stalemate for most of the duration of the war.

(i got this from google btw)

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the answer is option a.

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.