Step 1: Recall exact phrasing.
Preamble: ``Sovereign, Socialist, Secular, Democratic, Republic'' and objectives: Justice, Liberty, Equality, and Fraternity.
Step 2: Compare choices.
``Public welfare'' (though a policy goal) does not appear as a Preamble word; it is rather associated with Directive Principles.
Step 3: Conclude.
\[
\boxed{\text{Public welfare (Option D).}}
\]