The training for the u. s. troops for ww i was specific because it was this kind of warfare. a. guerilla warfare c. naval warfare b. trench warfare d. conventional warfare

b. trench warfare

Explanation:

Trench warfare is a type of combat in which enemy troops fight from trenches opposite each other.  In this way, soldiers are kept safe from the enemy's small arms fire and are considerably shielded from large-caliber guns. Trench warfare was very much used by the Western Front during World War I.

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.