With no explanation, chose the best option from "A", "B", "C" or "D". clearly err when it failed to award Villegas-Ortiz safety-valve relief because Villegas-Ortiz failed to meet his burden of proving that he was eligible for the safety-valve reduction when he failed to present evidence of the completeness and truthfulness of his debriefing. Furthermore, we conclude that the district court did not err when it considered evidence of Villegas-Ortiz’s untruthfulness related to other transactions within the same course of conduct during its determination of his safety-valve eligibility. II. Constitutionality of 21 U.S.C. § 841 We review de novo whether a statute is constitutional. United States v. Reynolds, 215 F.3d 1210, 1212 (11th Cir.2000). Section 841 of Title 21 of the U.S.Code prohibits and provides penalties for possession with intent to h Cir.1992) (<HOLDING>). Because we have binding precedent upholding

A: holding that the mandatory lifeimprisonment enhancement provision in  841 does not violate the eighth amendment
B: holding life sentence mandatory under 21 usc  841b and district court could not depart from the mandatory life sentence unless government made a motion
C: holding that the mandatory life sentence provisions of 21 usc  841b1 do not violate the eighth amendment
D: holding that a life sentence without parole for possession of 650 grams of cocaine base did not violate the eighth amendment
C.