This is not a question, please add the full question
I think its B. The US and Britain were close allies during this time. Also, they were extremely suspicious of German intentions, since the sinking of Lusitania and the Zimmerman note was caused by them.
Answer:
why it happned how it happend who started it why start it
Explanation:
Austria-Hungary had invaded and crossed over into, Serbia and Russia was in an alliance with Serbia, so they felt as though they had to help out. Hope this helps.
