With no explanation, chose the best option from "A", "B", "C" or "D". leadership enhancement, arguing on appeal that he performed only the functions of a street-level drug dealer, the lowest rung on a drug-conspiracy ladder. Erasto challenges the district court’s application of the section 3B1.4 use of a minor enhancement, arguing on appeal that A.G.’s presence at a drug deal conducted by he and Pedro was not legally sufficient to support that enhancement. Consistent with our circuit precedent in Savillon-Matute and Hargrove, rather than review the merits of each of these challenges, we may proceed directly to an “assumed error harmlessness inquiry.” Hargrove, 701 F.3d at 162. In Savillon-Matute, we held that harmless error review applies to a district court’s procedural sentencing errors made during its Guidelines calculation. 636 F.3d at 123-24 (<HOLDING>). A Guidelines error is considered harmless if

A: holding that the rule announced in simmons v south carolina 512 us 154 114 sct 2187 129 led2d 133 1994 doesnt apply retroactively on collateral review
B: holding that regulations that are unrelated to the content of speech are subject to an intermediate level of scrutiny quoting turner broad sys inc v fed commcn commn 512 us 622 642 114 sct 2445 129 led2d 497 1994 plurality opinion
C: holding that procedural errors at sentencing  are routinely subject to harmlessness review  quoting puckett v united states 556 us 129 141 129 sct 1423 173 led2d 266 2009
D: holding on the basis of melendezdiaz v massachusetts  us  129 sct 2527 174 led2d 314 2009 that a certificate of norecord is testimonial
C.