Why Were Political Leaders Reluctant to Call a Halt to the Arms

Why were political leaders reluctant to call a halt to the arms buildup in the years leading up to the outbreak of World War I?

A) They feared that cutting back would lead to unemployment and unrest.
B) They feared unrest in the colonies.
C) Most of them would have been personally bankrupted if they had not continued to spend public money on arms.
D) They feared that their countries would fall behind in modern technology.