Which best describes the way historians consider letters and journals? a. primary source documents that are useful in the study of history b. reliable sources for the study of history only if from a named source c. secondary source documents that are useful in the study of history d. unreliable sources for the study of history because they are too subjective

i think it should be slowed colonial western march

ching cong bing bong

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.