With no explanation, chose the best option from "A", "B", "C" or "D". recommendation by filing its objections within ten (10) days after being served a copy thereof. See Local Rule 510.2(A); Fed.R.Civ. P. 72(b). Moreover, 28 U.S.C. § 636(b)(1), in pertinent part, provides that: Within ten days of being served with a copy, any party may serve and file written objections to such proposed findings and recommendations as provided by rules of court. A judge of the court shall make a de novo determination of those portions of the report or specified proposed findings or recommendations to which objection is made. A judge Cir.1993) (stating that “[ojbjection to a magistrate’s report preserves only those objections that are specified”); Keating v. Secretary of H.H.S., 848 F.2d 271, 275 (1st Cir.1988); Borden v. Secretary of H.H.S., 836 F.2d 4, 6 (1st Cir.1987) (<HOLDING>). See generally United States v.

A: holding that we review constitutional challenges de novo
B: holding that review of the construction of a sentencing statute is de novo
C: holding that appellant was enti tied to a de novo review however he was not entitled to a de novo review of an argument never raised
D: recognizing de novo standard of review
C.