Question

7/22
which of the following is not an example of 20th or 21st century transportation innovations:
airplane
sail ship
high-speed train
electric scooter

Explanation:

Airplanes became a widespread 20th-century innovation, high-speed trains emerged in the late 20th century, and electric scooters are a 21st-century transportation development. Sail ships, however, have been used for thousands of years, predating the 20th century by many centuries.

Answer:

B. Sail Ship