What is two items became common for every American household during the 20s?

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.

Igor stravinksy’s ballet, the rite of spring, featured clashing music, harsh sounds and deliberately ugly dancing. upon its premier, theater goers literally rioted in the seats of the venue. historians argue this moment is a “breaking point” where europe proves it is destined to be plunged into world war i. why would historians make such a claim? a people were genuinely angry that someone so bad at composing could make a ballet b the ballet represents colonialism. it showed the consequences of centuries of exploitation of non-european people. c the ballet represents the changing ideologies of modernity. the youth of europe breaking all the old rules and the old guard clinging on to the last bits of power d the ballet represents war itself. it drudged up old rivalries between the french and german peoples, inciting the lust for combat.

Which of these events was a severe setback for the u. s. war effort in the pacific?