Answer:
The most correct would be (A)
Explanation: Here's How: The invention of the oil well had a significant impact on the standard of living in the United States. Of the options you provided, (A) is the most accurate. The discovery of oil led to the creation of the internal combustion engine, which in turn led to the development of automobiles. This allowed people to move around more easily and efficiently, improving their standard of living. The availability of oil also led to the development of other industries and technologies that improved people’s lives.