I'm confident in debates when I have facts, and good examples.
Nobles, skilled workers, and women
Plessy v. Ferguson. Plessy, who was 1/8 African American, tried to ride in a "whites only" train car, violating a Louisiana law that separate amenities must be provided for people of different races. The Court found that separate accommodations were allowed by the "privileges and immunities" and "equal protection" clauses of the fourteenth amendment as long as they were comparable in quality.
Answer:
the answer is D. Discounts
They made canals and roads for safer traveling