Which of the following statements is true regarding the education tax credits? Oa. The lifetime learning credit is available for qualifying tuition and related expenses incurred by students pursuing only graduate degrees. Ob. The American Opportunity credit permits a maximum credit of 20% of qualified expenses up to $10,000 per year. Oc. The American Opportunity credit is calculated per eligible student and the lifetime learning credit is available per taxpayer. Od. Continuing education expenses do not qualify for either education credit