A bloody trench warfare continued for over___.

Explanation:

The French built the 19-kilometre-long (12 mi) Lines of Weissenburg during the War of the Spanish Succession under the orders of the Duke of Villars in 1706. These were to remain in existence for just over 100 years and were last manned during Napoleon's Hundred Days (1815). Although trench warfare was very important throughout the war, the strategy neared an end around 1918, beginning with the Kaiser's Battle.

the national congress's powers over the states were specific and definite: it had the sole power to negotiate treaties, declare war, and make peace. all powers not granted to congress were reserved for state governments. congress had no power to levy taxes, for example.

d is the correct answer