Which of the following statements is correct regarding the taxation of C corporations?

a. Schedule M-1 is used to reconcile net income computed for financial accounting purposes with taxable income reported on the corporations tax return.

b. The corporate tax return is filed on Form 1120S.

c. Corporations can receive an automatic extension of nine months for filing the corporate return by filing Form 7004 by the due date for the return.

d. A corporation with total assets of $7,500,000 or more is required to file Schedule M-3.