The ruling dynatsy was the synasty that was ruling at the time
Why did historians choose to study this topic the correct answer is b
Answer:
Since 1990, many countries have undergone major reforms to their utility sectors, aimed at reducing the fiscal burden of financing public services, and improving the performance of dysfunctional utility operators. Reforms often have been successful in improving government finances, turning around enterprise performance, and expanding access to services. However, reforms have often also involved major tariff increases for essential services, substantial layoffs among public sector employees
Explanation:
the answer to your question is a) they had advanced planning and developed effective military methods.
The impact that Andrew Carnegie and John D. Rockefeller have on the American economy in the last half of the 1800s is that they established and dominated the new steel and oil industries.
Andrew Carnegie stabilized the steel industry, while Rockefeller also did it in the oil industry.
