A Short-Run Market Supply Curve in a Competitive Industry Is

Multiple Choice

A short-run market supply curve in a competitive industry is derived by:

A) multiplying the quantity supplied by each identical firm in the industry times the number of firms at each relevant price.
B) multiplying the quantity supplied by each differentiated firm in the industry times the number of firms at each relevant price.
C) adding market supply and market demand at each relevant price.
D) not usually upward sloping.