Final answer:
Dr. Roylott from Sherlock Holmes has a noted interest in things from India. The Trans-Atlantic slave trade was connected to West Africa, and ironworking technology originated in the eastern Sahara.
Moreover, European imperialism in Africa was spurred by competition for resources.
The Correct Option is; b) India.
Step-by-step explanation:
The character Dr. Roylott, from Sir Arthur Conan Doyle's Sherlock Holmes story "The Adventure of the Speckled Band," has a peculiar interest in things from India.
This interest is portrayed through various aspects of his lifestyle and the objects he keeps, such as a pet cheetah and baboon, reflecting his time spent in India.
Regarding historical context, the Trans-Atlantic slave trade was most directly involved with West Africa. Sophisticated ironworking technology in Africa developed independently in the eastern Sahara.
As for European history, Christian humanism developed in Northern Europe. The European "Scramble for Africa" was driven by international rivalry and the quest for resources and markets, leading to vast imperial conquests on the African continent.