Distinguish between the short run and the long run. In the short​ run, ______. In the long​ run, ______.
A. a​ firm's plant is​ fixed; a firm can change its plant
B. the quantity of only one factor of production is​ fixed; the quantities of all factors of production can be varied
C. all factors of production are variable except​ technology; the quantities of all factors of production can be varied
D. all costs are sunk​ costs; the quantity of only one factor of production is fixed