Scherer (1970) provides which of the following argument(s) to explain

Scherer (1970) provides which of the following argument(s) to explain the appearance of antitrust laws?

(a) Many farmers believed that the growth of big business came at the expense of growth in agriculture.
(b) Many ordinary individuals with moderate or low incomes were envious of the fame
and wealth accumulated by the relatively few industrial entrepreneurs.
(c) Falling costs in transportation resulted in growth of the optimal size of the firm.
(d) All of the above.

ANSWER

(d)