Which of the Following Would Most Likely Be Unconstitutional on the Basis

Which of the following would most likely be unconstitutional on the basis of the "suspect classification" doctrine?

A) A state law prohibiting persons who have been convicted of felonies from working as public school teachers
B) A state law prohibiting unmarried couples and single persons from becoming adoptive parents
C) A state law allowing landlords to refuse to rent to families with children under the age of six
D) A state law prohibiting noncitizens from working in the healthcare field
E) A state law prohibiting Latinos from voting