A major cause of World War 1 was?

A.) A decline in the policy of imperialism
B.) The existence of opposing alliances
C.) An increase I'm acts of aggrestion by England
D.) The spread of communism throughout Europe

Verified Answer :

Tuniss

Believe it's D.) The spread of communism throughout Europe

The correct answer is B)the existence of opposing alliances
trust me i did this question and i got it right !! :)