How did dr. tierno find answer to his question

Plyler v. doe did the following except: established that u.s. citizen children whose parents have been deported may petition to bring the parents back into the country. established that children regardless of immigration status may not be denied a public school education. resulted in the texas law being struck down because it was a state law rather than a federal law. gave children a form of heightened scrutiny even though it has not changed the constitutional review of most classifications.