Which change took place in the African slave trade in the 1500s? a. Enslaved people were sold to the Ottoman Empire as household servants and agricultural workers.

b. England, France, and the Netherlands made the slave trade illegal.

c. Enslaved people were sent to the Americas by Spanish and Portuguese as laborers.

d. Enslaved people were sold by African kings to increase their personal wealth.

the answer is C

Explanation:

history says enslaved people were sent to the Americas by Spanish and Portuguese as laborers . the answer is 100% correct

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.

might be agreeing to participate ethically with other european nations in the slave trade

or notifying other european nations when taking possession   of african territories