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To answer the following questions, refer to the following excerpt."Black Africans . . . played only a small part in . . . Mediterranean slavery before the middle of the fifteenth century. . . . Two . . . events . . . chang[ed] that situation. The capture of Constantinople by the Turks in 1453 made it much more difficult for Christian ships to reach the slave ports north of the Black Sea. At the . . . same time, the Portuguese voyagers down the coast of Africa made effective contact with sub-Saharan ports . . . and tap[ped] the sources of the slave trade that had previously flowed north across the Sahara. For the next century, Lagos and Lisbon in Portugal replaced the Black Sea ports as the main centers of supply for the Mediterranean slave trade."— Phillip D. Curtin, historian, The Rise and Fall of the Plantation Complex, 1999Which of the following pieces of evidence would best support Curtin's argument in this excerpt?a. Cartographers' maps depicting the Mediterranean region and West Africa in the fifteenth centuryb. The ship manifests of trade goods on Portuguese merchant ships between 1400 and 1500c. Plantation records documenting the growth of sugar production and profits during the fifteenth centuryd. Portuguese ship captains' diaries describing their impressions of Africa and its people

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