Which military invention, inspired by the automobile, was designed to protect soldiers during trench warfare?

I believe the answer is tanks.

Explanation:Tanks are armored vehicles designed to combine the military factors of fire, maneuver and protection. Although the concept of armored vehicles preceded the Great War, the tank was specifically developed to overcome the stalemate of trench warfare on the Western Front that followed the First Battle of Ypres (19 October-22 November 1914). The marrying of recent technological advances, such as the internal combustion engine with armor plating, enabled the tank’s development during World War I.

a.

congress passed laws allowing for free passage between states.