400
Invented in 1793 by Eli Whitney, THE COURSE OF HISTORY WAS CHANGED BY THE COTTON GIN BECAUSE IT WAS SO IMPORTANT A DEVICE.
A) the course of history was changed by the cotton gin, because it was so important a device
B) was the cotton gin so important a device that it changed the course of history
C) the considered the cotton gin so important a device because it changed the course of history
D) the cotton gin was so important a device that it changed the course of history
E) the course of history was change by the importance of the cotton gin
What is D) the cotton gin was so important a device that it changed the course of history