If you thought you were getting an inferior public education because of your ethnicity, which part of the Constitution would you rely on most heavily to justify your case?

Equal Protection Clause

Explanation:

The Equal Protection Law states that all individuals must be treated equally. Under the law, governmental body should not deny individuals equal protection of its laws. An individual should be treated exactly as others in similar circumstances and conditions. 

The Equal Protection Clause is a clause from the Fourteenth Amendment to the U.S Constitution which states that no state should deny any person within its control the equal protection of the laws.

the 4th option is the answer