What innovation allowed henry ford to make cars available to americans for a lower cost?

a. the use of assembly lines
b. cheaper steel for car frames
c. the development of faster railroad deliveries
d. a drop in the price of oil

The innovation that allowed henry fords to make cars availale to Americans at lower cost is : A. the use o assembly lines Assembly lines refer to a manufacturing process where a manufactur company only work to add some parts of the product before passing it to another workshop to be added another parts. With this, Henry ford was able to import some parts of the car from countries with cheaper resources

Countries of eastern europe.