Which of the following were new transport technologies after the Revolutionary War? Select all that apply.

(1 point)
Responses

turnpikes
turnpikes - only 2 answers are allowed

automobiles
automobiles - only 2 answers are allowed

railroads
railroads - only 2 answers are allowed

airplanes
airplanes - only 2 answers are allowed
Only 2 answers are allowed.
Only 2 answers are allowed.