3. when the declaration of independence says that unalienable rights are “endowed by their creator,” it means those rights are
guaranteed by the constitution
written into law
established by legislation and court rulings
absolute and cannot be surrendere

The Declaration states that these rights are "endowed by their Creator."  "Endowed" means given.  The Creator (as you can see from the capital C) is God.  So, these rights are given by God.  It is not given by the constitution (A is incorrect), or laws (B is wrong), or legislation or court rulings (C is wrong).  Out of respect to God, these rights are holy.  God knows best, these rights can't be surrendered (violated).  D is correct!

D: absolute and cannot be surrendered