The correct answer to this open question is the following.
There are no options attached. So we answer in the following way,
The true status of slaves in Europe in the sixteenth and seventeenth centuries was that it increased in number after a period where slavery had been substituted by serfdom since the 10th century. At the end of Medieval times, powerful empires such as the Ottoman Empire captured many slaves after their victories in wars, but powerful European monarchies saw big profits in participating in the so-called Atlantic Slave Trade during the 1500s and 1600s when White Europeans sold African people to landlords in the North American territory to work in the farmlands and plantations of the English colonies. The Dutch and the Portuguese also participated in the slave trade.