Question

u.s. soldiers during world war i source: library of congress, prints and photographs division this photograph shows a military tactic that — a made troops more vulnerable to long - range missiles, resulting in heavy losses b required soldiers to spend months in training in order to improve their skills c made direct attacks deadlier and led to a stalemate d required the ability to attack quickly resulting in a reliance on cavalry forces

Explanation:

The photograph shows trench warfare, a common military tactic in World War I. Trench warfare made direct - attacks very deadly as soldiers were exposed to enemy fire when leaving the trenches, leading to a stalemate on the Western Front. Long - range missiles were not a significant factor in the vulnerability of troops in trenches during WWI. Training time for trench warfare was not the main characteristic shown. Cavalry forces were not a key element in trench - based combat.

Answer:

C. made direct attacks deadlier and led to a stalemate