Question

During the 20th Century, battle included devastating effects on civilians due to advancements in weaponry. What were examples of the change in weapons? Air attacks from planes on non-specific targets but city blocks. Submarines were now common. Troops carried bayonets as well as guns. The use of the first hand grenades.

Answer 1

The correct answer is the last option. 

The first hand grenades were used in World War I, in 1914. While hand-thrown weapons had been created hundreds of years earlier, they were reinvented during WWI according to the different requirements of trench warfare.