It would be A bc they used them as spies
The major innovative technique that allowed Henry Ford to produce an automobile that could be manufactured and sold at a reasonable cost was the assembly line, which was used in factories and allowed each employee to focus purely on a single task, instead of multiple ones, which increased efficiency.
Heyo, your answer would be D. the computer that houses an Internet connection.
I believe its d
i hope this helped
Explanation:
I think is b or c hope this helps