Which of the following statements is incorrect with respect to determining E & P?
a. All tax-exempt income should be added back to taxable income.
b. Dividends received deductions should be added back to taxable income
c. Charitable contributions in excess of the 10% of taxable income limit should be subtracted from taxable income
d. Federal income tax refunds should be added back to taxable income
e. None of the above statements are incorrect.