With no explanation, chose the best option from "A", "B", "C" or "D". law of Puerto Rico for the rule of decision. See Erie R.R. Co. v. Tompkins, 304 U.S. 64, 78, 58 S.Ct. 817, 822, 82 L.Ed. 1188 (1938). Article 1425 of the Civil Code confers on a defendant a right to redeem a “litigated credit” or “litigious credit,” that is, the interest of a third party who has purchased a stake in the outcome of civil litigation. Evaluating this statute is a daunting task, made all the more complicated in this case as the parties have raised a myriad of issues ranging from the legal status of the financing agreements to the propriety of Pritzker’s efforts to prime the article 1425 pump. We address these issues sequentially, for the most part subjecting the district court’s determinations to plenary review. See United States v. Gifford, 17 F.3d 462, 472 (1st Cir.1994) (<HOLDING>); Liberty Mut. Ins. Co. v. Commercial Union

A: holding statutory interpretation is subject to de novo review
B: recognizing that the standard of review for issues of statutory interpretation and construction is de novo
C: holding that we review a district courts interpretation of a statute de novo
D: holding that questions of statutory interpretation are purely legal in nature and thus engender de novo review
D.