A. Strait of Black Sea
B. Strait of Marmara
C. Strait of Aegean
D. Strait of Istanbul
Explanation:
The Bosporus or Bosphorus, also known as the Strait of Istanbul, is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey. It forms part of the continental boundary between Europe and Asia, and divides Turkey by separating Anatolia from Thrace.