due to the nativist feelings and mass hysteria in the late progressive era, nicola sacco and bartolomeo vanzetti were wrongly arrested, convicted, and executed for murder by the state of massachusetts in 1927 because...

A. they murdered a guard and a paymaster during an armed robbery in braintree, ma.
b. their political ideology and ethnic background.
c. their religious beliefs as muslims.
d. they were secret spies for the kgb sent to america by the soviet union.