The case involving nicola sacco and bartolomeo vanzetti in 1921 is most associated with which of these issues? a. the first red scare b. the second world war c. the great depression d. the mckinley assassination

A--the First Red Scare: Sacco and Vanzetti were immigrants, who were targeted in the First Red Scare. 

Sacco and Vanzetti were new immigrants to the US coming from Eastern Europe which was experiencing new thinking in the way of government. Immigrants were targeted as being communists or anarchists both of which were targeted in the First Red Scare. The two were executed as fear mounted regarding the "other".