Assuming they all meet the income requirements, which of the following taxpayers qualify for the earned income credit in 2020?
a. A married taxpayer who files a separate tax return and has a dependent child
b. A single taxpayer who waited on tables for 3 months of the tax year and is claimed as a dependent by her mother
c. A single taxpayer who is self-employed and has a dependent child
d. A and c above
e. None of the above qualify for the earned income credit