With no explanation, chose the best option from "A", "B", "C" or "D". rather, he must point to § 3553(a) factors that support a lower sentence. See id. This he has failed to do. Rather, he argues only that the rebuttable presumption of reasonableness announced in Mykytiuk conflicts with United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), because “it has the effect of making the Guidelines mandatory, unless the defendant can show that his sentence should be outside of the Guidelines.” We have repeatedly rejected this argument, holding that a rebuttable presumption of reasonableness is consistent with Booker. See, e.g., United States v. Hankton, 463 F.3d 626, 630 n. 5 (7th Cir. 2006) (rejecting argument that applying rebuttable presumption renders guidelines mandatory); United States v. Williams, 436 F.3d 767, 769 (7th Cir.2006) (<HOLDING>). We are mindful that the Supreme Court of the

A: recognizing conflict
B: recognizing conflict between circuits
C: recognizing an exception to the conflict rule where the conflict arose after the award of the contract
D: recognizing that mykytiuk avoids conflict with booker
D.