With no explanation, chose the best option from "A", "B", "C" or "D". contemplated in Blakely. The admissions to which the Court alluded were facts the defendant admits in a guilty plea. Blakely, 542 U.S. at 304, 124 S.Ct. 2531; cf. Shepard v. United States, 544 U.S. 13, 16, 125 S.Ct. 1254, 161 L.Ed.2d 205 (2005) (noting that in determining the nature of the defendant’s prior conviction for sentence-enhancing purposes, the sentencer is "generally limited to examining the statutory definition [of the crime], charging document, written plea agreement, transcript of plea colloquy, and any explicit factual finding by the trial judge to which the defendant assented ”) (emphasis added). Courts have included a defendant’s testimony at sentencing and stipulations at trial in this category. See, e.g., United States v. Collier, 413 F.3d 858, 860-61 (8th Cir.2005) (<HOLDING>); United States v. Champion, 234 F.3d 106, 110

A: holding no sixth amendment violation occurred because the defendant chose to testify at sentencing and admitted the facts upon which the court imposed sentence
B: holding that there is no sixth amendment error when the sentence does not exceed the maximum authorized by facts the defendant admitted
C: holding that if sentence does not exceed maximum authorized by facts admitted by defendant or found by jury there is no sixth amendment violation
D: holding that the fact of a prior conviction for sentencing purposes need not be proved to a jury or admitted by defendant to satisfy the sixth amendment
A.