With no explanation, chose the best option from "A", "B", "C" or "D". 2Dl.l(c). U.S.S.G.App. C, Amend. 706 (2007). The effect of Amendment 706 is to provide a two-level reduction in base offense levels for certain crack cocaine offenses. See id. The Commission made this amendment retroactively applicable, effective as of March 3, 2008. See TJ.S.S.G.App. C, Amend. 713 (Supp. May 1, 2008) (listing Amendment 706 under U.S.S.G. § lB1.10(c) as a retroactively applicable amendment). In United States v. Moore, 541 F.3d 1323 (11th Cir.2008), petition for cert. filed, (U.S. Nov. 26, 2008) (No. 08-7610), we stated that “[w]here a retroactively applicable guideline amendment reduces a defendant’s base offense level, but does not alter the sentencing range upon which his or her sentence was based, § 3582(c)(2) does not authorize a reduction in sentence.” Id. at 1330 (<HOLDING>). Further, we have affirmed a district court’s

A: holding that while amendment 706 was applicable to the defendants in question because it reduced their base offense levels a reduction was not authorized because the amendment did not have the effect of lowering their applicable guideline ranges because of the application of the career offender guideline
B: holding that while amendment 706 was applica ble to the defendants in question because it reduced their base offense levels a reduction was not authorized because the amendment did not have the effect of lowering their applicable guideline ranges because of the application of the career offender guideline
C: holding that amendment 706 would not affect the guideline ranges for career offenders sentenced under  4b11
D: holding that the district court lacked authority under  3582c2 to grant a sentencing reduction to defendants who were career offenders sentenced under ussg  4b11 because amendment 706 would not ultimately affect their guideline ranges
C.