Question

What led to the increased popularity of automobiles? Ford’s use of skilled labor to make each car one at a time Ford’s decision to make cars more expensive Ford’s invention of the assembly line
***Ford’s revolutionary use of the assembly line

Answer 1

I think that your answer choice is correct because Ford did not want his cars to be expensive. He wanted them to be affordable for all people. Also, he did not invent the assembly line. 
I believe the answer you chose is the correct one. 

Answer 2

Ford’s revolutionary use of the assembly line


this is the correct answer