Briefly explain how industry in the united states has changed over the past 50 years.

The industry in the United States has changed a lot for the past 50 years. For example, we have advanced technologies, such as robotics and computerized automatization, have transformed manufacturing in the region. Also, farming the region's factories produce greater quantities of goods with fewer workers that in the past.

the answer is b. hope this !

a. i. only is correct.