The use of labor-saving devices in industry and agriculture. So b is the correct answer
27. The Mormons traveled to Utah.
28. The belief that John L. Sullivan coined to express is called The Manifest Destiny.
29. The war happened during the presidency of James K. Polk.
30. The treaty of Guadalupe Hidalgo was the treaty that end the mexican war of 1846.
31. They were forced to go on reservations since Andrew Jackson has made a treaty for the Native Americans.
32. Texas is known as the "Lone Star Republic".
The highest classes such as the Pharaoh himself and his loyal and royal friends. This was because they had enough money to build pyramids and organize burial rituals and thus brag of their wealth even in death.
