Answer: I believe it’s b.
Hope this helps! ^^
As I am thinking you mean "Producers" when you say "Sellers" I am going to go with, Yes. You are correct it is Supply.
(Also the other one is called Demand not price)
Stalin's regime proceeded to eliminate the scholars of Ukraine, forcibly deport Ukrainian Kulaks who fought its collectivization policies, and produce planned mass hunger by the hunger of Ukrainians, wherever they were found throughout the Soviet Empire.
As the war dragged on, the Union's advantages in factories, railroads, and manpower put the Confederacy at a great disadvantage.
The Canal was regarded as “The lifeline of the Empire” because it allowed for quick and easy access to the British colonies in Asia and Africa