4. All of the following contributed to the cause of World War I except...
A. Industrialization: The build-up of factories and industries in Europe.
B. Imperialism: The claiming of foreign territory by stronger nations.
C. Militarism: The build-up of the military, and the use of the military as a tool of diplomacy and defense.
D. Alliance Systems: Promising military assistance to countries with which they have an alliance.

A

Explanation:

i believe it is capitalists.  

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.