What is the same about the modern gin and the whitney gin

* Warning information from online*

Eli Whitney was born on December 8, 1765, in West borough, Massachusetts. Growing up, Whitney, whose father was a farmer, proved to be a talented mechanic and inventor. Among the objects he designed and built as a youth were a nail forge and a violin. In 1792, after graduating from Yale College (now Yale University), Whitney headed to the South. He originally planned to work as a private tutor but instead accepted an invitation to stay with Catherine Greene (1755–1814), the widow of an American Revolutionary War (1775-83) general, on her plantation, known as Mulberry Grove, near Savannah, Georgia. While there, Whitney learned about cotton production–in particular, the difficulty cotton farmers faced making a living.

can't without checkbox

the answer is d. selective incorporation. (apex)