Which of the following statements best compares the use of chemical weapons and machine guns in world war i?
both chemical weapons and machine guns to advance the battles on the western front
both chemical weapons and machine guns to create a stalemate on the western front.
neither chemical weapons nor machine guns were used by the allies on the western front
neither chemical weapons nor machine guns were used by the axis armies on the western front.

"Both chemical weapons and machine guns helped to create a stalemate on the Western Front" is the statement best compares the use of chemical weapons and machine guns in World War I

Option B

Explanation:

In April 1915, Germany was  the first use of a chemical weapon like chlorine gas, diphosgene, mustard gas at Ypres, Belgium against French. Later in 1917, French also started to use chemical weapons.

In 1925, due to  overuse of chemicals weapons, The Geneva Protocol treaty prohibited the use of biological or  chemical weapons in international armed conflicts.

Machine Gun also dominant during the first world war.They wiped down many enemy troops. machine guns was not a lethal weapon during Great War.