Which of the following is true regarding how a market type interacts with constant, increasing and decreasing cost industries? a. In a perfectly competitive market, firms tend to experience diseconomies of scale et relatively low levels of output.
b. In a natural monopoly, firms will always reach diseconomies of scale at high levels of output.
c. In a monopoly, firms are likely to begin experiencing diseconomies of scale at relatively low levels of output .
d. In a perfectly competitive market, firms will usually experience significant economies of scale until very high levels of output.