The invisible-hand concept suggests that.
a. profit maximization is inconsistent with an efficient allocation of resources.
b. government action is necessary to correct for market failures.
c. when firms maximize their profits, society's output will also be maximized.
d. changes in product demands are only randomly reflected in changes in the demands for resources.

Suppose that a paving company produces paved parking spaces (q) using a fixed quantity of land (t) and variable quantities of cement (c) and labor (l). the firm is currently paving 1,000 parking spaces. the firm's cost of cement is $3 comma 600.003,600.00 per acre covered (c) and its cost of labor is $35.0035.00/hour (w). for the quantities of c and l that the firm has chosen, mp subscript upper c baseline equals 60mpc=60 and mp subscript upper l baseline equals 7mpl=7. is this firm minimizing its cost of producing parking spaces?