an underlying cause of World War I was

Question

a. the ongoing dispute over the convoy system
b. the web of alliances European nations created for their defense
c. an alliance between the autocratic rulers of Germany and Russia
d. American insistence on neutrality

i think it's B
my book says the causes are :
imperialism, militarism, nationalism, and alliances

please let me know if i'm correct or not

Answer 1

Yes. B is correct.