What allowed the Nok culture and the kingdoms of Aksum and Ghana to create wealth and become powerful?​

Which of harriet martineau’s books is a foundational treatise on sociological data collection?

The second continental congress: a. made provisions for a continental army with george washington as commander-in-chief b. adopted a “declaration of causes of necessity of taking up arms” c. endorsed the olive branch petition d. all of the above

What was a result of the use of farming machines