Choose the correct statement:

a.	The corporate alternative minimum tax applies to all corporations including S corporations.
b.	The exemption amount is phased out at a rate of $1.00 for every $1.00 by which the corporations alternative minimum taxable base exceeds $210,000.
c.	The alternative minimum tax is imposed at 26 percent on the alternative minimum tax base up to $150,000 and 28 percent on the AMT base that is greater than $150,000.
d.	The alternative minimum tax base is equal to the corporations regular taxable income increased or decreased for certain adjustments, increased by tax preference items, and decreased by the exemption amount.