An indirect tax is exemplified by

Refer to the diagram and list of assumptions. Under these circumstances 9 million women will be employed in occupation Z:

(1) the labor force is comprised of 9 million men and 9 million women workers; (2) the economy has 3 occupations, X, Y, and Z, each having identical demand curves for labor; (3) men and women workers are homogeneous with respect to their labor-market capabilities; (4) women are discriminated against by being excluded from occupations X and Y and are confined to Z; and (5) aside from discrimination, the economy is competitive, and workers seek to maximize their earnings.

A.  5 million men in X, and 4 million men in Y.
B.  3 million men in X, and 6 million men in Y.
C.  6 million men in X, and 3 million men in Y.
D.  and 4.5 million men each in occupations X and Y.

The graph below shows demand and marginal cost for a perfectly competitive firm. If the firm is producing 100 units of output, increasing output by one unit would ________ the firm's profit by ________.

A. decrease, $1 B. increase, $1 C. increase, $2 D. increase, $3 E. decrease, $2