In 2015, Maia (who files as a head of household) reported regular taxable income of $116,300. She itemized her deductions, deducting $8,130 in charitable contributions and $3,130 in state income taxes. She claimed exemptions for herself and her son, Hermes, ($4,000 each). What is Maia's alternative minimum taxable income?

a. $116,300

b. $129,300

c. $135,560

d. $127,430