Answer:
They all come from one parent language.
<span>C. The trade of slaves weakened the rulers.
Portugal </span><span>was able to conquer the kingdom of Congo as the monarchy had an agreement to concede part of the population as slaves, which in years weakened the primary power present at the time, allowing the Europe nation to take advantage of this fact and conquer the country for itself, thanks to the weak primary power present.</span>
