Since Russia had an alliance with Serbia, it ordered its forces to mobilize for war. it wasn't a formal alliance, but it did specify that if someone declared war on Serbia, Russia would also step in. This resulted in other countries also getting involved in the war. The answer would be D!
-TetraFish
Because they rushed the treaty then it later failed.
2) The Maginot Line didn’t extend to The Benelux, The Germans simply went around Maginot.
Answer: d Jazz Age
Explanation: Sometimes the Roaring Twenties is also called the "Age of Jazz." Jazz music became very popular across the United States. People listened to it on the radio and heard live jazz bands at dance halls. One of the most popular forms of entertainment was to go out dancing to jazz music.