Answer:
D No, because the citizenship requirement is not necessary to achieve a compelling state interest.
Step-by-step explanation:
Option A is incorrect, because the Tenth Amendment reserves to the states power not granted to the federal government.
Option B is incorrect, because it states the standard that the Supreme Court has applied to primary and secondary school teachers.
Option C is also incorrect, because it states the wrong standard.
Hence, Option D is correct, because a state generally may not discriminate against aliens or foreigners absent a compelling state interest, and no compelling interest is served by prohibiting aliens or foreigners from teaching at a state university.