what invention transformed transportation in the first half of the twentieth century? automobile train…

what invention transformed transportation in the first half of the twentieth century? automobile train bicycle space shuttle
Answer
Brief Explanations:
Trains and bicycles were already in use before the 20th - century. Space shuttles came much later. Automobiles became widely - used and revolutionized transportation in the first half of the 20th century with mass - production like the Ford Model T.
Answer:
A. Automobile