Final answer:
The Court applied the Fourteenth Amendment to this case by using its Equal Protection Clause to grant equal protection under the law to those of Mexican ancestry.
Step-by-step explanation:
The Court applied the Fourteenth Amendment to this particular case by using its Equal Protection Clause to grant equal protection under the law to those of Mexican ancestry. The Supreme Court held that the Fourteenth Amendment protects not only white and Black individuals, but also extends to other racial groups, including Mexican Americans. The Court ruled that Mexican Americans were a "special class" entitled to equal protection under the Fourteenth Amendment.