Why was the 1920s called the Roaring Twenties? The decade ushered in the beginning of radio programming. The decade ushered in several new and noisy fads. The decade ushered in an era of prosperity and rebellion. The decade ushered in an era of protest and dissatisfaction.

C: The decade ushered in an era of prosperity and rebellion.

Explanation:

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why was the national assembly formed by the third estate?

the estates-general had not been assembled since 1614, and its deputies drew up long lists of grievances and called for sweeping political and social reforms. the third estate, which had the most representatives, declared itself the national assembly and took an oath to force a new constitution on the king.

c holding free elections