was Eli Whitney’s idea that transformed the manufacturing industry. A. The Telephone
B. The Cotton Gin
C. The Spinning Ginny
D. Interchangeable Parts

D. Interchangeable Parts

Explanation:

Eli Whitney, (born December 8, 1765, Westboro, Massachusetts [U.S.]—died January 8, 1825, New Haven, Connecticut, U.S.), American inventor, mechanical engineer, and manufacturer, best remembered as the inventor of the cotton gin but most important for developing the concept of mass production of interchangeable parts.

they required less loading and unloading

explanation:

the shipping container improved shipping because it cut down on unloading time by three weeks, eliminated wasted space, and allowed ships to carry.

what's the passage bud?