According to the​ text, firms encounter rising costs when they attempt to produce more in the same time period. As a​ consequence, they must be offered a higher price to be willing to incur these higher costs. The resulting relationship between price and quantity supplied is
A. direct​ (or positive) and is called the law of demand.
B. inverse​ (or negative) and is called the law of supply.
C. direct​ (or positive) and is called the law of human nature.
D. direct​ (or positive) and is called the law of supply.