challenge: Which legal basis clarifies cases related to cross-border double jeopardy and third-party affairs under the European Arrest Warrant Framework Decision?
  
  A. Article 50 of the EU Charter of Fundamental Rights
  B. Article 4 of Protocol No. 7 under the ECHR
  C. Article 3(2) of the European Arrest Warrant Framework Decision
  D. Article 54 of the Convention Implementing the Schengen Agreement
  Answer: 