Question

In which decade did both automobile and air travel become popular and convenient?

Answer 1

Answer:

1950

Explanation:

Automobile mass production started at 1920s, however cars makers had to face challenges that made the access to cars more difficult  such as the Great Depression after World War I. On the other hand, airplanes were more a military technology for more decades while other improvments were discovered to make air travel more efficient . it was only during the 1950s with companies like Boeing in play when technology and industry were ready to  make air travel a popular service in conjuntion with an already recovered car industry.

Answer 2

I think it's B. 1950s