What was the name of the 1881 convention that ceded Thessaly and the Arta region from the Ottoman Empire to Greece?

• A Treaty of Berlin
• B Convention of Constantinople ✓
• C Agreement of Alexandroupolis
• D Pact of Bucharest

The 1881 Convention of Constantinople, following the Treaty of Berlin, transferred almost all of Thessaly and the district of Arta from Ottoman to Greek rule, nearly doubling the kingdom's arable land.