Which Statement About the Haymarket Affair Is FALSE

Which statement about the Haymarket Affair is FALSE?

A) A bomb exploded, killing a police officer.
B) The Knights of Labor was directly responsible for the violence that took place at Haymarket.
C) Employers took the opportunity to paint the labor movement as a dangerous and un-American force prone to violence and controlled by foreign-born radicals.
D) Seven of the eight men accused of plotting the Haymarket bombing were foreign born.
E) Laborers were gathered at Haymarket Square to demonstrate for an eight-hour workday.