Which people between 950-1066 conquered the regions of Persian and the Fertile Crescent? Really important people that affected the Middle East, Crusades and the Middle Ages

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.