Read the following excerpt from a US court opinion:
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of the case, because the court treated the Guidelines range as mandatory and “the Supreme Court has now excised the mandatory nature of the Guidelines in Booker.” Shelton, 400 F.3d at 1330 (reviewing Booker claim for plain error). In Shelton, we concluded that “it was Booker error for the district court to sentence Shelton under a mandatory Guidelines scheme, even in the absence of a Sixth Amendment enhancement violation.” Id. (citation omitted). Based on the excision of the mandatory provisions of the Guidelines, in cases involving preserved Booker error, we have required the Government to show that the mandatory, as opposed to the advisory, application of the Guidelines did not contribute to the defendant’s sentence. See United States v. Paz, 405 F.3d 946, 948-49 (11th Cir.2005) . The government bears the burden to show that
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What is the most suitable continuation to the opinion? Your options are:
A. holding that sentencing under the mandatory guidelines regime creates a presumption of prejudice that the government must rebut with clear and specific evidence that the district court would not have  sentenced the defendant to a lower sentence if it had treated the guidelines as advisory
B. holding statutory error harmless where district court imposed the highest available sentence under guidelines range and considered sentencing to the statutory maximum
C. holding that the government could not meet its burden under harmless error analysis because the record indicated that district court would have imposed shorter sentencing under advisory guidelines scheme
D. holding statutory booker error was not harmless where district court imposed sentence in middle of guidelines range and there were no statements in the record reflecting that the court would have imposed the same or greater sentence under advisory guidelines
E. holding government failed to meet it burden to show harmlessness of mandatory application of the guidelines where transcript of sentencing hearing indicated district court would have imposed shorter sentence under advisory sentencing scheme
Reply with [A, B, C, D, E] only.