Which Statement Best Describes the Supreme Court's Interpretation of Three-Strikes

Which statement best describes the Supreme Court's interpretation of three-strikes laws?

A) Sentencing enhancement based on three-strikes legislation does not violate the Eighth Amendment because there has been no clearly established precedent for punishment proportionality.
B) Judges have full discretion to disregard a three-strikes law recommended sentence.
C) Three-strikes laws violate the Constitution's double jeopardy clause because sentences can be enhanced based on prior offenses.
D) The Court has clearly established a proportionality test to determine whether a sentence is disproportionate to the crime committed.