[Solved] ________ angina generally indicates a progression of atherosclerotic heart disease and is also referred to as "preinfarctional" angina. A) Ateliosis B) Unstable C) Stable D) Predictable Long-run Equilibrium: A state in which all factors of production and costs are variable, leading to a situation where economic profits have been normalized or eliminated due to competition. Constant Costs: Costs that do not change with the level of output or activity within a certain range. Short-run Supply Curve: A graphical representation showing the relation between the price of a product and the quantity of the product that a firm is willing and able to sell, given fixed resources. MC Curve: A graph that shows the relationship between the marginal cost and the quantity of output produced, typically upward sloping.