i NEED help
How did the kings of Ghana use the law of supply and demand to their advantage?

They only sold a set number of slaves each season, increasing their value.
They made large quantities of salt available, hurting the profits of competitors.

They limited the amount of gold available for trade, increasing its value.

all of the above

Question

i NEED help
How did the kings of Ghana use the law of supply and demand to their advantage? 

They only sold a set number of slaves each season, increasing their value. 
They made large quantities of salt available, hurting the profits of competitors. 

They limited the amount of gold available for trade, increasing its value. 

all of the above

anonymous · Answer

@zhough96 if you need help ask me! Its (They limited the amount of gold available for trade, increasing its value)