The corporation, as a form of business organization, fueled the positi

The corporation, as a form of business organization, fueled the positive trend toward federal regulation of business activities for all of the following reasons except

(a) Corporations were rapidly becoming more numerous than sole proprietorships and partnerships.
(b) Corporations made possible or encouraged growth in the number of giant enterprises.
(c) Corporations were adept at market manipulations, including price-fixing.
(d) Corporations were able to take advantage of economies of scale which made possible business organizations whose affairs overlapped local or state jurisdictions, creating the need for federal control across state lines.

ANSWER

(a)