What was the significance of Ford’s Highland Park plant in the transit

What was the significance of Ford’s Highland Park plant in the transition to modern America?

a. It was the first factory to open in the United States.
b. It marked the beginning of mass production in the United States.
c. This plant produced crucial military equipment for the First World War.
d. It was the place where organized labor first emerged.
e. Women were employed here for the first time.

ANSWER
B