Need how do historians and archaeologists know what the explorers experience? how do they know what the native american people experienced?

Is this statement true or false? before 1850, workers in american mines, mills, and factories were poorly paid, but their safety on the job was always protected by strict laws.

What is the definition of evolution

Why were presidents andrew jackson and martin van buren unwilling to annex texas? a. they did not want texas to be admitted to the union as a slave state. b. they feared that the annexation of texas as a slave state would lead to political problems within the union. c. they thought that texas was too large to be admitted to the union as one state. d. they did not believe in the idea of manifest destiny.