Pre-history is the time after people started keeping written records. true false

Why do many scientists suppose the land bridge theory of migration?

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.

What would be considered a secondary source about the assasination of abraham lincoln