PLZ HELP! Why was the Battle of Gaugamela an important turning point in Alexander’s conquest of the Persian Empire?

Which of the following contributed to the grown and success of the roman empire

The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.

Describe the government under, and powers given by, the articles of confederation.