With no explanation, chose the best option from "A", "B", "C" or "D". proposed findings or recommendations to which objection is made. A judge of the court may accept, reject, or modify, in whole or in part, the findings or recommendations made by the magistrate judge. “Absent objection, ... [a] district court ha[s] a right to assume that [the affected party] agree[s] to the magistrate’s recommendation.” Templeman v. Chris Craft Corp., 770 F.2d 245, 247 (1st Cir. 1985), cert. denied, 474 U.S. 1021, 106 S.Ct. 571, 88 L.Ed.2d 556 (1985). Additionally, “failure to raise objections to the R & R waives that party’s right to review in the district court and those claims not preserved by such objections are precluded upon appeal.” Davet v. Macearme, 973 F.2d 22, 30-31 (1st Cir.1992); see also Henley Drilling Co. v. McGee, 36 F.3d 143, 150-51 (1st Cir.1994) (<HOLDING>); Lewry v. Town of Standish, 984 F.2d 25, 27

A: holding that objections are required when challenging findings actually set out in a magistrates recommendation as well as the magistrates failure to make additional findings
B: holding that objections are required to challenge magistrate judges findings as well as magistrates failure to make additional findings
C: holding an argument waived on appeal for failure to raise the issue in objection to the magistrates recommendation
D: holding that errors of law in a magistrates findings and recommendations pursuant to section 636b1b can be challenged on appeal even in the absence of the filing of objections in the district court
A.