Question

how did henry ford affect the automobile industry?
he made car production cheaper by improving the assembly line.
he made car production more expensive by making more luxury cars.
he made car production more expensive by mass - producing vehicles.
he made car production cheaper by using customized parts.

Explanation:

Henry Ford is known for improving the assembly line, which increased efficiency and reduced the cost of car production. The option "He made car production cheaper by improving the assembly line" aligns with historical facts. Other options are incorrect: making luxury cars or using customized parts would not lower costs, and mass - producing (when done via assembly line improvement) lowers cost, not raises it.

Answer:

B. He made car production cheaper by improving the assembly line.