Which of the Following Passages Best Concludes the Following Statement

Which of the following passages best concludes the following statement regarding Castigliano's second theorem, the Method of Least Work:"the internal work accomplished by each member or each portion of a statically indeterminate structure subjected to a set of external loads is the least possible amount necessary to …"

A) Deflect just to the point prior to failure
B) Deform in a manner consistent with its physical limitations
C) Maintain equilibrium in supporting the loads
D) None of the above