Answer:
Option C, the controversial trial of Nicola Sacco and Bartolomeo Vanzetti, is the right answer.
Explanation:
During the early phase of the 20th Century, there was an influx of immigrants in the United States which gave rise to nativism in America.
This immigration led to expanding the diversity of belief, culture, language etc. causing great concern and tension in the minds of the local residents or the natives. This also led to the adoption of the racial approach towards the emigrants.
Nativism reached its zenith during the trial of Bartolomeo Vanzetti and Nicola Sacco. They were two Italian immigrants who were accused of robbery and murder. Despite the lack of convicting evidence, the Jury declared them guilty and ultimately executed on August 23rd, 1927.