They placed a price control on petroleum companies because the oil crisis was getting out of hand. There was an embargo on countries that produced oil and on oil trading and prices were skyrocketing, going up from 3$ per barrel to a 12$ per barrel, and even more in many countries. Without the price regulations the prices could go even higher and the oil industry could collapse because people wouldn't buy oil.
The empire was founded by Sundiata Keita and became renowned for the wealth of its rulers, especially Mansa Musa I hope this is helps
According to e2020 it was
C. evaluating sources.
Because many believed there could be gold and many other riches that were undiscovered and also wished in claiming new land for wars in case another broke out
