Triple

Target entity: Byzantine Empire under Heraclian dynasty
Context triple: [Byzantine Empire under Isaurian dynasty, follows, Byzantine Empire under Heraclian dynasty]

• A. Byzantine Empire under Isaurian dynasty
  The Byzantine Empire under the Isaurian dynasty was a period (8th–9th centuries) marked by strong military emperors, major administrative and legal reforms, and the contentious policy of Iconoclasm that reshaped the empire’s religious and political landscape.
• B. Byzantine Empire under John VI Kantakouzenos
  The Byzantine Empire under John VI Kantakouzenos was a mid-14th-century phase of the Eastern Roman Empire marked by civil war, political instability, and increasing reliance on emerging Ottoman power.
• C. Justinian dynasty
  The Justinian dynasty was a ruling family of the Byzantine Empire in the 6th century, best known for Emperor Justinian I, who oversaw major territorial reconquests, legal codification, and architectural achievements like the Hagia Sophia.
• D. Heraclian dynasty chosen
  The Heraclian dynasty was a ruling family of the Byzantine Empire (610–711) best known for Emperor Heraclius, who reorganized the empire’s administration and military while confronting major Persian and early Islamic expansions.
• E. Eastern Roman Empire under Zeno
  The Eastern Roman Empire under Emperor Zeno was a late 5th-century continuation of the Roman state centered in Constantinople, marked by internal revolts, religious conflicts, and struggles to maintain imperial authority in the face of barbarian kingdoms.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.